Home / 20,691.81-28,528.07-15,034.77

Finding the Fourth Proportional to 20,691.81, 28,528.07 and 15,034.77

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Solution

The fourth proportional to 20,691.81, 28,528.07 and 15,034.77 is: 20,728.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,691.81 : 28,528.07 = 15,034.77 : x
  2. Step 2: Convert to fraction form
    20,691.81/28,528.07 = 15,034.77/x
  3. Step 3: Cross multiply
    20,691.81x = 28,528.07 × 15,034.77
  4. Step 4: Simplify right side
    20,691.81x = 428,912,895.82
  5. Step 5: Solve for x
    x = 428,912,895.82/20,691.81
  6. Step 6: Final answer
    x = 20,728.63

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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.