Home / 13,689.38-20,531.10-5,366.72

Finding the Fourth Proportional to 13,689.38, 20,531.10 and 5,366.72

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Solution

The fourth proportional to 13,689.38, 20,531.10 and 5,366.72 is: 8,048.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.38 : 20,531.10 = 5,366.72 : x
  2. Step 2: Convert to fraction form
    13,689.38/20,531.10 = 5,366.72/x
  3. Step 3: Cross multiply
    13,689.38x = 20,531.10 × 5,366.72
  4. Step 4: Simplify right side
    13,689.38x = 110,184,664.99
  5. Step 5: Solve for x
    x = 110,184,664.99/13,689.38
  6. Step 6: Final answer
    x = 8,048.92

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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.