Home / 15,463.92-21,339.48-8,390.28

Finding the Fourth Proportional to 15,463.92, 21,339.48 and 8,390.28

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Solution

The fourth proportional to 15,463.92, 21,339.48 and 8,390.28 is: 11,578.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,463.92 : 21,339.48 = 8,390.28 : x
  2. Step 2: Convert to fraction form
    15,463.92/21,339.48 = 8,390.28/x
  3. Step 3: Cross multiply
    15,463.92x = 21,339.48 × 8,390.28
  4. Step 4: Simplify right side
    15,463.92x = 179,044,212.25
  5. Step 5: Solve for x
    x = 179,044,212.25/15,463.92
  6. Step 6: Final answer
    x = 11,578.19

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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.