Home / 13,521.80-20,268.93-9,139.70

Finding the Fourth Proportional to 13,521.80, 20,268.93 and 9,139.70

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Solution

The fourth proportional to 13,521.80, 20,268.93 and 9,139.70 is: 13,700.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,521.80 : 20,268.93 = 9,139.70 : x
  2. Step 2: Convert to fraction form
    13,521.80/20,268.93 = 9,139.70/x
  3. Step 3: Cross multiply
    13,521.80x = 20,268.93 × 9,139.70
  4. Step 4: Simplify right side
    13,521.80x = 185,251,939.52
  5. Step 5: Solve for x
    x = 185,251,939.52/13,521.80
  6. Step 6: Final answer
    x = 13,700.24

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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.