Home / 20,415.71-28,176.76-12,462.56

Finding the Fourth Proportional to 20,415.71, 28,176.76 and 12,462.56

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Solution

The fourth proportional to 20,415.71, 28,176.76 and 12,462.56 is: 17,200.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,415.71 : 28,176.76 = 12,462.56 : x
  2. Step 2: Convert to fraction form
    20,415.71/28,176.76 = 12,462.56/x
  3. Step 3: Cross multiply
    20,415.71x = 28,176.76 × 12,462.56
  4. Step 4: Simplify right side
    20,415.71x = 351,154,562.11
  5. Step 5: Solve for x
    x = 351,154,562.11/20,415.71
  6. Step 6: Final answer
    x = 17,200.21

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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.