Home / 31,220.16-42,997.12-31,125.12

Finding the Fourth Proportional to 31,220.16, 42,997.12 and 31,125.12

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Solution

The fourth proportional to 31,220.16, 42,997.12 and 31,125.12 is: 42,866.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,220.16 : 42,997.12 = 31,125.12 : x
  2. Step 2: Convert to fraction form
    31,220.16/42,997.12 = 31,125.12/x
  3. Step 3: Cross multiply
    31,220.16x = 42,997.12 × 31,125.12
  4. Step 4: Simplify right side
    31,220.16x = 1,338,290,519.65
  5. Step 5: Solve for x
    x = 1,338,290,519.65/31,220.16
  6. Step 6: Final answer
    x = 42,866.23

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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.