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Finding the Fourth Proportional to 28,124.52, 38,811.60 and 15,549.18

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Solution

The fourth proportional to 28,124.52, 38,811.60 and 15,549.18 is: 21,457.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,124.52 : 38,811.60 = 15,549.18 : x
  2. Step 2: Convert to fraction form
    28,124.52/38,811.60 = 15,549.18/x
  3. Step 3: Cross multiply
    28,124.52x = 38,811.60 × 15,549.18
  4. Step 4: Simplify right side
    28,124.52x = 603,488,554.49
  5. Step 5: Solve for x
    x = 603,488,554.49/28,124.52
  6. Step 6: Final answer
    x = 21,457.74

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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.