Home / 20,913.28-28,855.96-12,414.20

Finding the Fourth Proportional to 20,913.28, 28,855.96 and 12,414.20

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Solution

The fourth proportional to 20,913.28, 28,855.96 and 12,414.20 is: 17,129.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,913.28 : 28,855.96 = 12,414.20 : x
  2. Step 2: Convert to fraction form
    20,913.28/28,855.96 = 12,414.20/x
  3. Step 3: Cross multiply
    20,913.28x = 28,855.96 × 12,414.20
  4. Step 4: Simplify right side
    20,913.28x = 358,223,658.63
  5. Step 5: Solve for x
    x = 358,223,658.63/20,913.28
  6. Step 6: Final answer
    x = 17,129.00

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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.