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Finding the Fourth Proportional to 30,449.64, 42,019.62 and 17,020.92

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Solution

The fourth proportional to 30,449.64, 42,019.62 and 17,020.92 is: 23,488.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,449.64 : 42,019.62 = 17,020.92 : x
  2. Step 2: Convert to fraction form
    30,449.64/42,019.62 = 17,020.92/x
  3. Step 3: Cross multiply
    30,449.64x = 42,019.62 × 17,020.92
  4. Step 4: Simplify right side
    30,449.64x = 715,212,590.45
  5. Step 5: Solve for x
    x = 715,212,590.45/30,449.64
  6. Step 6: Final answer
    x = 23,488.38

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.