Home / 20,490.30-28,277.01-12,423.87

Finding the Fourth Proportional to 20,490.30, 28,277.01 and 12,423.87

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Solution

The fourth proportional to 20,490.30, 28,277.01 and 12,423.87 is: 17,145.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.30 : 28,277.01 = 12,423.87 : x
  2. Step 2: Convert to fraction form
    20,490.30/28,277.01 = 12,423.87/x
  3. Step 3: Cross multiply
    20,490.30x = 28,277.01 × 12,423.87
  4. Step 4: Simplify right side
    20,490.30x = 351,309,896.23
  5. Step 5: Solve for x
    x = 351,309,896.23/20,490.30
  6. Step 6: Final answer
    x = 17,145.18

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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.