Home / 31,972.16-47,981.28-18,117.44

Finding the Fourth Proportional to 31,972.16, 47,981.28 and 18,117.44

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Solution

The fourth proportional to 31,972.16, 47,981.28 and 18,117.44 is: 27,189.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,972.16 : 47,981.28 = 18,117.44 : x
  2. Step 2: Convert to fraction form
    31,972.16/47,981.28 = 18,117.44/x
  3. Step 3: Cross multiply
    31,972.16x = 47,981.28 × 18,117.44
  4. Step 4: Simplify right side
    31,972.16x = 869,297,961.52
  5. Step 5: Solve for x
    x = 869,297,961.52/31,972.16
  6. Step 6: Final answer
    x = 27,189.22

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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.