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Finding the Fourth Proportional to 30,987.59, 46,484.88 and 9,920.24

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Solution

The fourth proportional to 30,987.59, 46,484.88 and 9,920.24 is: 14,881.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,987.59 : 46,484.88 = 9,920.24 : x
  2. Step 2: Convert to fraction form
    30,987.59/46,484.88 = 9,920.24/x
  3. Step 3: Cross multiply
    30,987.59x = 46,484.88 × 9,920.24
  4. Step 4: Simplify right side
    30,987.59x = 461,141,362.16
  5. Step 5: Solve for x
    x = 461,141,362.16/30,987.59
  6. Step 6: Final answer
    x = 14,881.49

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.