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Finding the Fourth Proportional to 15,007.68, 20,710.08 and 8,719.20

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Solution

The fourth proportional to 15,007.68, 20,710.08 and 8,719.20 is: 12,032.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,007.68 : 20,710.08 = 8,719.20 : x
  2. Step 2: Convert to fraction form
    15,007.68/20,710.08 = 8,719.20/x
  3. Step 3: Cross multiply
    15,007.68x = 20,710.08 × 8,719.20
  4. Step 4: Simplify right side
    15,007.68x = 180,575,329.54
  5. Step 5: Solve for x
    x = 180,575,329.54/15,007.68
  6. Step 6: Final answer
    x = 12,032.19

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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.