Home / 20,318.42-28,040.57-11,366.30

Finding the Fourth Proportional to 20,318.42, 28,040.57 and 11,366.30

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Solution

The fourth proportional to 20,318.42, 28,040.57 and 11,366.30 is: 15,686.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,318.42 : 28,040.57 = 11,366.30 : x
  2. Step 2: Convert to fraction form
    20,318.42/28,040.57 = 11,366.30/x
  3. Step 3: Cross multiply
    20,318.42x = 28,040.57 × 11,366.30
  4. Step 4: Simplify right side
    20,318.42x = 318,717,333.76
  5. Step 5: Solve for x
    x = 318,717,333.76/20,318.42
  6. Step 6: Final answer
    x = 15,686.13

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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.