Home / 20,576.80-28,376.11-17,390.17

Finding the Fourth Proportional to 20,576.80, 28,376.11 and 17,390.17

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Solution

The fourth proportional to 20,576.80, 28,376.11 and 17,390.17 is: 23,981.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,576.80 : 28,376.11 = 17,390.17 : x
  2. Step 2: Convert to fraction form
    20,576.80/28,376.11 = 17,390.17/x
  3. Step 3: Cross multiply
    20,576.80x = 28,376.11 × 17,390.17
  4. Step 4: Simplify right side
    20,576.80x = 493,465,376.84
  5. Step 5: Solve for x
    x = 493,465,376.84/20,576.80
  6. Step 6: Final answer
    x = 23,981.64

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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.