Home / 20,521.17-28,319.13-11,089.71

Finding the Fourth Proportional to 20,521.17, 28,319.13 and 11,089.71

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Solution

The fourth proportional to 20,521.17, 28,319.13 and 11,089.71 is: 15,303.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.17 : 28,319.13 = 11,089.71 : x
  2. Step 2: Convert to fraction form
    20,521.17/28,319.13 = 11,089.71/x
  3. Step 3: Cross multiply
    20,521.17x = 28,319.13 × 11,089.71
  4. Step 4: Simplify right side
    20,521.17x = 314,050,939.15
  5. Step 5: Solve for x
    x = 314,050,939.15/20,521.17
  6. Step 6: Final answer
    x = 15,303.75

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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.