Home / 10,143.69-15,215.55-4,220.85

Finding the Fourth Proportional to 10,143.69, 15,215.55 and 4,220.85

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Solution

The fourth proportional to 10,143.69, 15,215.55 and 4,220.85 is: 6,331.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,143.69 : 15,215.55 = 4,220.85 : x
  2. Step 2: Convert to fraction form
    10,143.69/15,215.55 = 4,220.85/x
  3. Step 3: Cross multiply
    10,143.69x = 15,215.55 × 4,220.85
  4. Step 4: Simplify right side
    10,143.69x = 64,222,554.22
  5. Step 5: Solve for x
    x = 64,222,554.22/10,143.69
  6. Step 6: Final answer
    x = 6,331.28

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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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.