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Finding the Fourth Proportional to 18,877.60, 28,309.20 and 5,725.60

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Solution

The fourth proportional to 18,877.60, 28,309.20 and 5,725.60 is: 8,586.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,877.60 : 28,309.20 = 5,725.60 : x
  2. Step 2: Convert to fraction form
    18,877.60/28,309.20 = 5,725.60/x
  3. Step 3: Cross multiply
    18,877.60x = 28,309.20 × 5,725.60
  4. Step 4: Simplify right side
    18,877.60x = 162,087,155.52
  5. Step 5: Solve for x
    x = 162,087,155.52/18,877.60
  6. Step 6: Final answer
    x = 8,586.22

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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.