Home / 20,856.20-31,290.70-16,475.40

Finding the Fourth Proportional to 20,856.20, 31,290.70 and 16,475.40

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Solution

The fourth proportional to 20,856.20, 31,290.70 and 16,475.40 is: 24,718.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,856.20 : 31,290.70 = 16,475.40 : x
  2. Step 2: Convert to fraction form
    20,856.20/31,290.70 = 16,475.40/x
  3. Step 3: Cross multiply
    20,856.20x = 31,290.70 × 16,475.40
  4. Step 4: Simplify right side
    20,856.20x = 515,526,798.78
  5. Step 5: Solve for x
    x = 515,526,798.78/20,856.20
  6. Step 6: Final answer
    x = 24,718.16

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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.