Home / 20,815.56-28,726.08-11,384.76

Finding the Fourth Proportional to 20,815.56, 28,726.08 and 11,384.76

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Solution

The fourth proportional to 20,815.56, 28,726.08 and 11,384.76 is: 15,711.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,815.56 : 28,726.08 = 11,384.76 : x
  2. Step 2: Convert to fraction form
    20,815.56/28,726.08 = 11,384.76/x
  3. Step 3: Cross multiply
    20,815.56x = 28,726.08 × 11,384.76
  4. Step 4: Simplify right side
    20,815.56x = 327,039,526.54
  5. Step 5: Solve for x
    x = 327,039,526.54/20,815.56
  6. Step 6: Final answer
    x = 15,711.30

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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.