Home / 20,818.28-28,711.07-14,756.53

Finding the Fourth Proportional to 20,818.28, 28,711.07 and 14,756.53

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Solution

The fourth proportional to 20,818.28, 28,711.07 and 14,756.53 is: 20,351.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,818.28 : 28,711.07 = 14,756.53 : x
  2. Step 2: Convert to fraction form
    20,818.28/28,711.07 = 14,756.53/x
  3. Step 3: Cross multiply
    20,818.28x = 28,711.07 × 14,756.53
  4. Step 4: Simplify right side
    20,818.28x = 423,675,765.79
  5. Step 5: Solve for x
    x = 423,675,765.79/20,818.28
  6. Step 6: Final answer
    x = 20,351.14

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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.