Home / 23,115.87-31,899.72-12,505.47

Finding the Fourth Proportional to 23,115.87, 31,899.72 and 12,505.47

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Solution

The fourth proportional to 23,115.87, 31,899.72 and 12,505.47 is: 17,257.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    23,115.87 : 31,899.72 = 12,505.47 : x
  2. Step 2: Convert to fraction form
    23,115.87/31,899.72 = 12,505.47/x
  3. Step 3: Cross multiply
    23,115.87x = 31,899.72 × 12,505.47
  4. Step 4: Simplify right side
    23,115.87x = 398,920,991.47
  5. Step 5: Solve for x
    x = 398,920,991.47/23,115.87
  6. Step 6: Final answer
    x = 17,257.45

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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.