Home / 20,510.38-28,305.66-15,465.70

Finding the Fourth Proportional to 20,510.38, 28,305.66 and 15,465.70

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Solution

The fourth proportional to 20,510.38, 28,305.66 and 15,465.70 is: 21,343.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,510.38 : 28,305.66 = 15,465.70 : x
  2. Step 2: Convert to fraction form
    20,510.38/28,305.66 = 15,465.70/x
  3. Step 3: Cross multiply
    20,510.38x = 28,305.66 × 15,465.70
  4. Step 4: Simplify right side
    20,510.38x = 437,766,845.86
  5. Step 5: Solve for x
    x = 437,766,845.86/20,510.38
  6. Step 6: Final answer
    x = 21,343.67

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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.