Home / 18,644.40-25,731.36-10,689.12

Finding the Fourth Proportional to 18,644.40, 25,731.36 and 10,689.12

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Solution

The fourth proportional to 18,644.40, 25,731.36 and 10,689.12 is: 14,752.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,644.40 : 25,731.36 = 10,689.12 : x
  2. Step 2: Convert to fraction form
    18,644.40/25,731.36 = 10,689.12/x
  3. Step 3: Cross multiply
    18,644.40x = 25,731.36 × 10,689.12
  4. Step 4: Simplify right side
    18,644.40x = 275,045,594.80
  5. Step 5: Solve for x
    x = 275,045,594.80/18,644.40
  6. Step 6: Final answer
    x = 14,752.18

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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.