Home / 20,521.29-28,319.37-11,089.85

Finding the Fourth Proportional to 20,521.29, 28,319.37 and 11,089.85

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Solution

The fourth proportional to 20,521.29, 28,319.37 and 11,089.85 is: 15,303.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.29 : 28,319.37 = 11,089.85 : x
  2. Step 2: Convert to fraction form
    20,521.29/28,319.37 = 11,089.85/x
  3. Step 3: Cross multiply
    20,521.29x = 28,319.37 × 11,089.85
  4. Step 4: Simplify right side
    20,521.29x = 314,057,565.39
  5. Step 5: Solve for x
    x = 314,057,565.39/20,521.29
  6. Step 6: Final answer
    x = 15,303.99

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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.