Home / 11,122.72-15,348.96-6,407.20

Finding the Fourth Proportional to 11,122.72, 15,348.96 and 6,407.20

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Solution

The fourth proportional to 11,122.72, 15,348.96 and 6,407.20 is: 8,841.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,122.72 : 15,348.96 = 6,407.20 : x
  2. Step 2: Convert to fraction form
    11,122.72/15,348.96 = 6,407.20/x
  3. Step 3: Cross multiply
    11,122.72x = 15,348.96 × 6,407.20
  4. Step 4: Simplify right side
    11,122.72x = 98,343,856.51
  5. Step 5: Solve for x
    x = 98,343,856.51/11,122.72
  6. Step 6: Final answer
    x = 8,841.71

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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.