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Finding the Fourth Proportional to 18,749.10, 28,123.65 and 7,652.10

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Solution

The fourth proportional to 18,749.10, 28,123.65 and 7,652.10 is: 11,478.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,749.10 : 28,123.65 = 7,652.10 : x
  2. Step 2: Convert to fraction form
    18,749.10/28,123.65 = 7,652.10/x
  3. Step 3: Cross multiply
    18,749.10x = 28,123.65 × 7,652.10
  4. Step 4: Simplify right side
    18,749.10x = 215,204,982.17
  5. Step 5: Solve for x
    x = 215,204,982.17/18,749.10
  6. Step 6: Final answer
    x = 11,478.15

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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.