Home / 31,085.20-42,913.38-21,066.52

Finding the Fourth Proportional to 31,085.20, 42,913.38 and 21,066.52

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Solution

The fourth proportional to 31,085.20, 42,913.38 and 21,066.52 is: 29,082.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,085.20 : 42,913.38 = 21,066.52 : x
  2. Step 2: Convert to fraction form
    31,085.20/42,913.38 = 21,066.52/x
  3. Step 3: Cross multiply
    31,085.20x = 42,913.38 × 21,066.52
  4. Step 4: Simplify right side
    31,085.20x = 904,035,578.04
  5. Step 5: Solve for x
    x = 904,035,578.04/31,085.20
  6. Step 6: Final answer
    x = 29,082.51

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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.