Home / 20,697.45-28,570.76-20,393.70

Finding the Fourth Proportional to 20,697.45, 28,570.76 and 20,393.70

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Solution

The fourth proportional to 20,697.45, 28,570.76 and 20,393.70 is: 28,151.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,697.45 : 28,570.76 = 20,393.70 : x
  2. Step 2: Convert to fraction form
    20,697.45/28,570.76 = 20,393.70/x
  3. Step 3: Cross multiply
    20,697.45x = 28,570.76 × 20,393.70
  4. Step 4: Simplify right side
    20,697.45x = 582,663,508.21
  5. Step 5: Solve for x
    x = 582,663,508.21/20,697.45
  6. Step 6: Final answer
    x = 28,151.46

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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.