Home / 15,549.05-21,435.93-13,149.38

Finding the Fourth Proportional to 15,549.05, 21,435.93 and 13,149.38

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Solution

The fourth proportional to 15,549.05, 21,435.93 and 13,149.38 is: 18,127.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,549.05 : 21,435.93 = 13,149.38 : x
  2. Step 2: Convert to fraction form
    15,549.05/21,435.93 = 13,149.38/x
  3. Step 3: Cross multiply
    15,549.05x = 21,435.93 × 13,149.38
  4. Step 4: Simplify right side
    15,549.05x = 281,869,082.04
  5. Step 5: Solve for x
    x = 281,869,082.04/15,549.05
  6. Step 6: Final answer
    x = 18,127.74

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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.