Home / 13,689.42-18,874.28-11,424.03

Finding the Fourth Proportional to 13,689.42, 18,874.28 and 11,424.03

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Solution

The fourth proportional to 13,689.42, 18,874.28 and 11,424.03 is: 15,750.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,689.42 : 18,874.28 = 11,424.03 : x
  2. Step 2: Convert to fraction form
    13,689.42/18,874.28 = 11,424.03/x
  3. Step 3: Cross multiply
    13,689.42x = 18,874.28 × 11,424.03
  4. Step 4: Simplify right side
    13,689.42x = 215,620,283.83
  5. Step 5: Solve for x
    x = 215,620,283.83/13,689.42
  6. Step 6: Final answer
    x = 15,750.87

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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.