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Finding the Fourth Proportional to 26,415.71, 39,613.54 and 7,689.52

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Solution

The fourth proportional to 26,415.71, 39,613.54 and 7,689.52 is: 11,531.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,415.71 : 39,613.54 = 7,689.52 : x
  2. Step 2: Convert to fraction form
    26,415.71/39,613.54 = 7,689.52/x
  3. Step 3: Cross multiply
    26,415.71x = 39,613.54 × 7,689.52
  4. Step 4: Simplify right side
    26,415.71x = 304,609,108.10
  5. Step 5: Solve for x
    x = 304,609,108.10/26,415.71
  6. Step 6: Final answer
    x = 11,531.36

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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.