Home / 15,138.57-20,888.94-8,424.27

Finding the Fourth Proportional to 15,138.57, 20,888.94 and 8,424.27

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Solution

The fourth proportional to 15,138.57, 20,888.94 and 8,424.27 is: 11,624.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,138.57 : 20,888.94 = 8,424.27 : x
  2. Step 2: Convert to fraction form
    15,138.57/20,888.94 = 8,424.27/x
  3. Step 3: Cross multiply
    15,138.57x = 20,888.94 × 8,424.27
  4. Step 4: Simplify right side
    15,138.57x = 175,974,070.57
  5. Step 5: Solve for x
    x = 175,974,070.57/15,138.57
  6. Step 6: Final answer
    x = 11,624.22

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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.