Home / 20,749.64-31,124.39-12,432.15

Finding the Fourth Proportional to 20,749.64, 31,124.39 and 12,432.15

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Solution

The fourth proportional to 20,749.64, 31,124.39 and 12,432.15 is: 18,648.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,749.64 : 31,124.39 = 12,432.15 : x
  2. Step 2: Convert to fraction form
    20,749.64/31,124.39 = 12,432.15/x
  3. Step 3: Cross multiply
    20,749.64x = 31,124.39 × 12,432.15
  4. Step 4: Simplify right side
    20,749.64x = 386,943,022.98
  5. Step 5: Solve for x
    x = 386,943,022.98/20,749.64
  6. Step 6: Final answer
    x = 18,648.18

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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.