Home / 11,123.18-15,349.54-6,649.40

Finding the Fourth Proportional to 11,123.18, 15,349.54 and 6,649.40

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Solution

The fourth proportional to 11,123.18, 15,349.54 and 6,649.40 is: 9,175.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,123.18 : 15,349.54 = 6,649.40 : x
  2. Step 2: Convert to fraction form
    11,123.18/15,349.54 = 6,649.40/x
  3. Step 3: Cross multiply
    11,123.18x = 15,349.54 × 6,649.40
  4. Step 4: Simplify right side
    11,123.18x = 102,065,231.28
  5. Step 5: Solve for x
    x = 102,065,231.28/11,123.18
  6. Step 6: Final answer
    x = 9,175.90

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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.