Home / 18,715.10-25,835.28-12,345.48

Finding the Fourth Proportional to 18,715.10, 25,835.28 and 12,345.48

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Solution

The fourth proportional to 18,715.10, 25,835.28 and 12,345.48 is: 17,042.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,715.10 : 25,835.28 = 12,345.48 : x
  2. Step 2: Convert to fraction form
    18,715.10/25,835.28 = 12,345.48/x
  3. Step 3: Cross multiply
    18,715.10x = 25,835.28 × 12,345.48
  4. Step 4: Simplify right side
    18,715.10x = 318,948,932.53
  5. Step 5: Solve for x
    x = 318,948,932.53/18,715.10
  6. Step 6: Final answer
    x = 17,042.33

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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.