Home / 15,538.20-21,443.28-8,465.13

Finding the Fourth Proportional to 15,538.20, 21,443.28 and 8,465.13

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Solution

The fourth proportional to 15,538.20, 21,443.28 and 8,465.13 is: 11,682.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,538.20 : 21,443.28 = 8,465.13 : x
  2. Step 2: Convert to fraction form
    15,538.20/21,443.28 = 8,465.13/x
  3. Step 3: Cross multiply
    15,538.20x = 21,443.28 × 8,465.13
  4. Step 4: Simplify right side
    15,538.20x = 181,520,152.83
  5. Step 5: Solve for x
    x = 181,520,152.83/15,538.20
  6. Step 6: Final answer
    x = 11,682.19

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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.