Home / 20,689.92-31,021.28-13,648.46

Finding the Fourth Proportional to 20,689.92, 31,021.28 and 13,648.46

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Solution

The fourth proportional to 20,689.92, 31,021.28 and 13,648.46 is: 20,463.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,689.92 : 31,021.28 = 13,648.46 : x
  2. Step 2: Convert to fraction form
    20,689.92/31,021.28 = 13,648.46/x
  3. Step 3: Cross multiply
    20,689.92x = 31,021.28 × 13,648.46
  4. Step 4: Simplify right side
    20,689.92x = 423,392,699.23
  5. Step 5: Solve for x
    x = 423,392,699.23/20,689.92
  6. Step 6: Final answer
    x = 20,463.72

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.