Home / 18,347.10-25,317.27-12,687.90

Finding the Fourth Proportional to 18,347.10, 25,317.27 and 12,687.90

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Solution

The fourth proportional to 18,347.10, 25,317.27 and 12,687.90 is: 17,508.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,347.10 : 25,317.27 = 12,687.90 : x
  2. Step 2: Convert to fraction form
    18,347.10/25,317.27 = 12,687.90/x
  3. Step 3: Cross multiply
    18,347.10x = 25,317.27 × 12,687.90
  4. Step 4: Simplify right side
    18,347.10x = 321,222,990.03
  5. Step 5: Solve for x
    x = 321,222,990.03/18,347.10
  6. Step 6: Final answer
    x = 17,508.11

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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.