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Finding the Fourth Proportional to 28,011.52, 38,655.66 and 15,436

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Solution

The fourth proportional to 28,011.52, 38,655.66 and 15,436 is: 21,301.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,011.52 : 38,655.66 = 15,436 : x
  2. Step 2: Convert to fraction form
    28,011.52/38,655.66 = 15,436/x
  3. Step 3: Cross multiply
    28,011.52x = 38,655.66 × 15,436
  4. Step 4: Simplify right side
    28,011.52x = 596,688,767.76
  5. Step 5: Solve for x
    x = 596,688,767.76/28,011.52
  6. Step 6: Final answer
    x = 21,301.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.