Home / 10,122.72-15,184.08-5,189.21

Finding the Fourth Proportional to 10,122.72, 15,184.08 and 5,189.21

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Solution

The fourth proportional to 10,122.72, 15,184.08 and 5,189.21 is: 7,783.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,122.72 : 15,184.08 = 5,189.21 : x
  2. Step 2: Convert to fraction form
    10,122.72/15,184.08 = 5,189.21/x
  3. Step 3: Cross multiply
    10,122.72x = 15,184.08 × 5,189.21
  4. Step 4: Simplify right side
    10,122.72x = 78,793,417.74
  5. Step 5: Solve for x
    x = 78,793,417.74/10,122.72
  6. Step 6: Final answer
    x = 7,783.82

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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.