Home / 15,463.91-21,340.10-8,390.18

Finding the Fourth Proportional to 15,463.91, 21,340.10 and 8,390.18

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Solution

The fourth proportional to 15,463.91, 21,340.10 and 8,390.18 is: 11,578.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,463.91 : 21,340.10 = 8,390.18 : x
  2. Step 2: Convert to fraction form
    15,463.91/21,340.10 = 8,390.18/x
  3. Step 3: Cross multiply
    15,463.91x = 21,340.10 × 8,390.18
  4. Step 4: Simplify right side
    15,463.91x = 179,047,131.57
  5. Step 5: Solve for x
    x = 179,047,131.57/15,463.91
  6. Step 6: Final answer
    x = 11,578.39

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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.