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Finding the Fourth Proportional to 19,124.71, 28,689.80 and 9,255.87

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Solution

The fourth proportional to 19,124.71, 28,689.80 and 9,255.87 is: 13,885.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,124.71 : 28,689.80 = 9,255.87 : x
  2. Step 2: Convert to fraction form
    19,124.71/28,689.80 = 9,255.87/x
  3. Step 3: Cross multiply
    19,124.71x = 28,689.80 × 9,255.87
  4. Step 4: Simplify right side
    19,124.71x = 265,549,012.85
  5. Step 5: Solve for x
    x = 265,549,012.85/19,124.71
  6. Step 6: Final answer
    x = 13,885.13

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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.