Home / 20,649.47-28,500.70-12,585.75

Finding the Fourth Proportional to 20,649.47, 28,500.70 and 12,585.75

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Solution

The fourth proportional to 20,649.47, 28,500.70 and 12,585.75 is: 17,371.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,649.47 : 28,500.70 = 12,585.75 : x
  2. Step 2: Convert to fraction form
    20,649.47/28,500.70 = 12,585.75/x
  3. Step 3: Cross multiply
    20,649.47x = 28,500.70 × 12,585.75
  4. Step 4: Simplify right side
    20,649.47x = 358,702,685.03
  5. Step 5: Solve for x
    x = 358,702,685.03/20,649.47
  6. Step 6: Final answer
    x = 17,371.04

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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.