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Finding the Fourth Proportional to 42,390.90, 63,615.15 and 23,670.90

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Solution

The fourth proportional to 42,390.90, 63,615.15 and 23,670.90 is: 35,522.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    42,390.90 : 63,615.15 = 23,670.90 : x
  2. Step 2: Convert to fraction form
    42,390.90/63,615.15 = 23,670.90/x
  3. Step 3: Cross multiply
    42,390.90x = 63,615.15 × 23,670.90
  4. Step 4: Simplify right side
    42,390.90x = 1,505,827,854.14
  5. Step 5: Solve for x
    x = 1,505,827,854.14/42,390.90
  6. Step 6: Final answer
    x = 35,522.43

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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.