Home / 13,689.11-20,572.14-8,143.46

Finding the Fourth Proportional to 13,689.11, 20,572.14 and 8,143.46

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Solution

The fourth proportional to 13,689.11, 20,572.14 and 8,143.46 is: 12,238.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.11 : 20,572.14 = 8,143.46 : x
  2. Step 2: Convert to fraction form
    13,689.11/20,572.14 = 8,143.46/x
  3. Step 3: Cross multiply
    13,689.11x = 20,572.14 × 8,143.46
  4. Step 4: Simplify right side
    13,689.11x = 167,528,399.20
  5. Step 5: Solve for x
    x = 167,528,399.20/13,689.11
  6. Step 6: Final answer
    x = 12,238.08

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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.