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Finding the Fourth Proportional to 42,370.62, 63,486.81 and 21,565.50

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Solution

The fourth proportional to 42,370.62, 63,486.81 and 21,565.50 is: 32,313.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,370.62 : 63,486.81 = 21,565.50 : x
  2. Step 2: Convert to fraction form
    42,370.62/63,486.81 = 21,565.50/x
  3. Step 3: Cross multiply
    42,370.62x = 63,486.81 × 21,565.50
  4. Step 4: Simplify right side
    42,370.62x = 1,369,124,801.06
  5. Step 5: Solve for x
    x = 1,369,124,801.06/42,370.62
  6. Step 6: Final answer
    x = 32,313.07

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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.