Home / 31,447.10-47,207.10-18,981.20

Finding the Fourth Proportional to 31,447.10, 47,207.10 and 18,981.20

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Solution

The fourth proportional to 31,447.10, 47,207.10 and 18,981.20 is: 28,493.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,447.10 : 47,207.10 = 18,981.20 : x
  2. Step 2: Convert to fraction form
    31,447.10/47,207.10 = 18,981.20/x
  3. Step 3: Cross multiply
    31,447.10x = 47,207.10 × 18,981.20
  4. Step 4: Simplify right side
    31,447.10x = 896,047,406.52
  5. Step 5: Solve for x
    x = 896,047,406.52/31,447.10
  6. Step 6: Final answer
    x = 28,493.80

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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.