Home / 31,034.68-42,820.40-18,288.39

Finding the Fourth Proportional to 31,034.68, 42,820.40 and 18,288.39

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Solution

The fourth proportional to 31,034.68, 42,820.40 and 18,288.39 is: 25,233.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,034.68 : 42,820.40 = 18,288.39 : x
  2. Step 2: Convert to fraction form
    31,034.68/42,820.40 = 18,288.39/x
  3. Step 3: Cross multiply
    31,034.68x = 42,820.40 × 18,288.39
  4. Step 4: Simplify right side
    31,034.68x = 783,116,175.16
  5. Step 5: Solve for x
    x = 783,116,175.16/31,034.68
  6. Step 6: Final answer
    x = 25,233.58

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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.