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Finding the Fourth Proportional to 39,419.58, 59,130.72 and 12,764.91

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Solution

The fourth proportional to 39,419.58, 59,130.72 and 12,764.91 is: 19,147.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,419.58 : 59,130.72 = 12,764.91 : x
  2. Step 2: Convert to fraction form
    39,419.58/59,130.72 = 12,764.91/x
  3. Step 3: Cross multiply
    39,419.58x = 59,130.72 × 12,764.91
  4. Step 4: Simplify right side
    39,419.58x = 754,798,319.04
  5. Step 5: Solve for x
    x = 754,798,319.04/39,419.58
  6. Step 6: Final answer
    x = 19,147.80

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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.