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Finding the Fourth Proportional to 28,125.60, 38,810.40 and 15,549.60

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Solution

The fourth proportional to 28,125.60, 38,810.40 and 15,549.60 is: 21,456.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,125.60 : 38,810.40 = 15,549.60 : x
  2. Step 2: Convert to fraction form
    28,125.60/38,810.40 = 15,549.60/x
  3. Step 3: Cross multiply
    28,125.60x = 38,810.40 × 15,549.60
  4. Step 4: Simplify right side
    28,125.60x = 603,486,195.84
  5. Step 5: Solve for x
    x = 603,486,195.84/28,125.60
  6. Step 6: Final answer
    x = 21,456.83

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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.