Home / 15,144.14-20,897.87-9,478.64

Finding the Fourth Proportional to 15,144.14, 20,897.87 and 9,478.64

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Solution

The fourth proportional to 15,144.14, 20,897.87 and 9,478.64 is: 13,079.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,144.14 : 20,897.87 = 9,478.64 : x
  2. Step 2: Convert to fraction form
    15,144.14/20,897.87 = 9,478.64/x
  3. Step 3: Cross multiply
    15,144.14x = 20,897.87 × 9,478.64
  4. Step 4: Simplify right side
    15,144.14x = 198,083,391.35
  5. Step 5: Solve for x
    x = 198,083,391.35/15,144.14
  6. Step 6: Final answer
    x = 13,079.87

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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.