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Finding the Fourth Proportional to 39,790.70, 59,689.79 and 11,710.77

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Solution

The fourth proportional to 39,790.70, 59,689.79 and 11,710.77 is: 17,567.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,790.70 : 59,689.79 = 11,710.77 : x
  2. Step 2: Convert to fraction form
    39,790.70/59,689.79 = 11,710.77/x
  3. Step 3: Cross multiply
    39,790.70x = 59,689.79 × 11,710.77
  4. Step 4: Simplify right side
    39,790.70x = 699,013,402.04
  5. Step 5: Solve for x
    x = 699,013,402.04/39,790.70
  6. Step 6: Final answer
    x = 17,567.26

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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.