Home / 31,079.14-42,905.10-21,060.52

Finding the Fourth Proportional to 31,079.14, 42,905.10 and 21,060.52

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Solution

The fourth proportional to 31,079.14, 42,905.10 and 21,060.52 is: 29,074.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    31,079.14 : 42,905.10 = 21,060.52 : x
  2. Step 2: Convert to fraction form
    31,079.14/42,905.10 = 21,060.52/x
  3. Step 3: Cross multiply
    31,079.14x = 42,905.10 × 21,060.52
  4. Step 4: Simplify right side
    31,079.14x = 903,603,716.65
  5. Step 5: Solve for x
    x = 903,603,716.65/31,079.14
  6. Step 6: Final answer
    x = 29,074.28

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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.