Home / 20,665.28-28,478.76-14,990.24

Finding the Fourth Proportional to 20,665.28, 28,478.76 and 14,990.24

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Solution

The fourth proportional to 20,665.28, 28,478.76 and 14,990.24 is: 20,658.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,665.28 : 28,478.76 = 14,990.24 : x
  2. Step 2: Convert to fraction form
    20,665.28/28,478.76 = 14,990.24/x
  3. Step 3: Cross multiply
    20,665.28x = 28,478.76 × 14,990.24
  4. Step 4: Simplify right side
    20,665.28x = 426,903,447.30
  5. Step 5: Solve for x
    x = 426,903,447.30/20,665.28
  6. Step 6: Final answer
    x = 20,658.00

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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.