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Finding the Fourth Proportional to 19,167.20, 28,752.15 and 10,851.20

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Solution

The fourth proportional to 19,167.20, 28,752.15 and 10,851.20 is: 16,277.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,167.20 : 28,752.15 = 10,851.20 : x
  2. Step 2: Convert to fraction form
    19,167.20/28,752.15 = 10,851.20/x
  3. Step 3: Cross multiply
    19,167.20x = 28,752.15 × 10,851.20
  4. Step 4: Simplify right side
    19,167.20x = 311,995,330.08
  5. Step 5: Solve for x
    x = 311,995,330.08/19,167.20
  6. Step 6: Final answer
    x = 16,277.56

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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.