Home / 20,718.40-31,077.60-10,876.90

Finding the Fourth Proportional to 20,718.40, 31,077.60 and 10,876.90

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Solution

The fourth proportional to 20,718.40, 31,077.60 and 10,876.90 is: 16,315.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,718.40 : 31,077.60 = 10,876.90 : x
  2. Step 2: Convert to fraction form
    20,718.40/31,077.60 = 10,876.90/x
  3. Step 3: Cross multiply
    20,718.40x = 31,077.60 × 10,876.90
  4. Step 4: Simplify right side
    20,718.40x = 338,027,947.44
  5. Step 5: Solve for x
    x = 338,027,947.44/20,718.40
  6. Step 6: Final answer
    x = 16,315.35

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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.