Home / 31,130.06-42,968.68-21,701.66

Finding the Fourth Proportional to 31,130.06, 42,968.68 and 21,701.66

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Solution

The fourth proportional to 31,130.06, 42,968.68 and 21,701.66 is: 29,954.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,130.06 : 42,968.68 = 21,701.66 : x
  2. Step 2: Convert to fraction form
    31,130.06/42,968.68 = 21,701.66/x
  3. Step 3: Cross multiply
    31,130.06x = 42,968.68 × 21,701.66
  4. Step 4: Simplify right side
    31,130.06x = 932,491,414.91
  5. Step 5: Solve for x
    x = 932,491,414.91/31,130.06
  6. Step 6: Final answer
    x = 29,954.70

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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.