Home / 15,463.96-21,339.69-8,390.23

Finding the Fourth Proportional to 15,463.96, 21,339.69 and 8,390.23

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Solution

The fourth proportional to 15,463.96, 21,339.69 and 8,390.23 is: 11,578.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,463.96 : 21,339.69 = 8,390.23 : x
  2. Step 2: Convert to fraction form
    15,463.96/21,339.69 = 8,390.23/x
  3. Step 3: Cross multiply
    15,463.96x = 21,339.69 × 8,390.23
  4. Step 4: Simplify right side
    15,463.96x = 179,044,928.20
  5. Step 5: Solve for x
    x = 179,044,928.20/15,463.96
  6. Step 6: Final answer
    x = 11,578.21

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Half scale
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Double scale
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Similar ratio
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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.