Home / 21,175.57-31,869.71-15,937.71

Finding the Fourth Proportional to 21,175.57, 31,869.71 and 15,937.71

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Solution

The fourth proportional to 21,175.57, 31,869.71 and 15,937.71 is: 23,986.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,175.57 : 31,869.71 = 15,937.71 : x
  2. Step 2: Convert to fraction form
    21,175.57/31,869.71 = 15,937.71/x
  3. Step 3: Cross multiply
    21,175.57x = 31,869.71 × 15,937.71
  4. Step 4: Simplify right side
    21,175.57x = 507,930,195.76
  5. Step 5: Solve for x
    x = 507,930,195.76/21,175.57
  6. Step 6: Final answer
    x = 23,986.61

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.