Home / 13,521.30-20,268.18-9,139.20

Finding the Fourth Proportional to 13,521.30, 20,268.18 and 9,139.20

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Solution

The fourth proportional to 13,521.30, 20,268.18 and 9,139.20 is: 13,699.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.30 : 20,268.18 = 9,139.20 : x
  2. Step 2: Convert to fraction form
    13,521.30/20,268.18 = 9,139.20/x
  3. Step 3: Cross multiply
    13,521.30x = 20,268.18 × 9,139.20
  4. Step 4: Simplify right side
    13,521.30x = 185,234,950.66
  5. Step 5: Solve for x
    x = 185,234,950.66/13,521.30
  6. Step 6: Final answer
    x = 13,699.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.