Home / 20,521.13-28,319.22-11,089.76

Finding the Fourth Proportional to 20,521.13, 28,319.22 and 11,089.76

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Solution

The fourth proportional to 20,521.13, 28,319.22 and 11,089.76 is: 15,303.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.13 : 28,319.22 = 11,089.76 : x
  2. Step 2: Convert to fraction form
    20,521.13/28,319.22 = 11,089.76/x
  3. Step 3: Cross multiply
    20,521.13x = 28,319.22 × 11,089.76
  4. Step 4: Simplify right side
    20,521.13x = 314,053,211.59
  5. Step 5: Solve for x
    x = 314,053,211.59/20,521.13
  6. Step 6: Final answer
    x = 15,303.90

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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.