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Finding the Fourth Proportional to 47,287.60, 70,941.94 and 20,637.90

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Solution

The fourth proportional to 47,287.60, 70,941.94 and 20,637.90 is: 30,961.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    47,287.60 : 70,941.94 = 20,637.90 : x
  2. Step 2: Convert to fraction form
    47,287.60/70,941.94 = 20,637.90/x
  3. Step 3: Cross multiply
    47,287.60x = 70,941.94 × 20,637.90
  4. Step 4: Simplify right side
    47,287.60x = 1,464,092,663.53
  5. Step 5: Solve for x
    x = 1,464,092,663.53/47,287.60
  6. Step 6: Final answer
    x = 30,961.45

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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.