Home / 15,204.27-20,981.69-8,490.02

Finding the Fourth Proportional to 15,204.27, 20,981.69 and 8,490.02

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Solution

The fourth proportional to 15,204.27, 20,981.69 and 8,490.02 is: 11,716.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,204.27 : 20,981.69 = 8,490.02 : x
  2. Step 2: Convert to fraction form
    15,204.27/20,981.69 = 8,490.02/x
  3. Step 3: Cross multiply
    15,204.27x = 20,981.69 × 8,490.02
  4. Step 4: Simplify right side
    15,204.27x = 178,134,820.38
  5. Step 5: Solve for x
    x = 178,134,820.38/15,204.27
  6. Step 6: Final answer
    x = 11,716.10

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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.