Home / 15,304.35-21,122.12-8,590.38

Finding the Fourth Proportional to 15,304.35, 21,122.12 and 8,590.38

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Solution

The fourth proportional to 15,304.35, 21,122.12 and 8,590.38 is: 11,855.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,304.35 : 21,122.12 = 8,590.38 : x
  2. Step 2: Convert to fraction form
    15,304.35/21,122.12 = 8,590.38/x
  3. Step 3: Cross multiply
    15,304.35x = 21,122.12 × 8,590.38
  4. Step 4: Simplify right side
    15,304.35x = 181,447,037.21
  5. Step 5: Solve for x
    x = 181,447,037.21/15,304.35
  6. Step 6: Final answer
    x = 11,855.91

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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.