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Finding the Fourth Proportional to 39,612, 59,421.36 and 11,910

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Solution

The fourth proportional to 39,612, 59,421.36 and 11,910 is: 17,866.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,612 : 59,421.36 = 11,910 : x
  2. Step 2: Convert to fraction form
    39,612/59,421.36 = 11,910/x
  3. Step 3: Cross multiply
    39,612x = 59,421.36 × 11,910
  4. Step 4: Simplify right side
    39,612x = 707,708,397.60
  5. Step 5: Solve for x
    x = 707,708,397.60/39,612
  6. Step 6: Final answer
    x = 17,866.01

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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.