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Finding the Fourth Proportional to 9,909.20, 14,981.36 and 9,909.20

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Solution

The fourth proportional to 9,909.20, 14,981.36 and 9,909.20 is: 14,981.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,909.20 : 14,981.36 = 9,909.20 : x
  2. Step 2: Convert to fraction form
    9,909.20/14,981.36 = 9,909.20/x
  3. Step 3: Cross multiply
    9,909.20x = 14,981.36 × 9,909.20
  4. Step 4: Simplify right side
    9,909.20x = 148,453,292.51
  5. Step 5: Solve for x
    x = 148,453,292.51/9,909.20
  6. Step 6: Final answer
    x = 14,981.36

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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 (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.