Home / 11,164.40-15,407.12-6,688.56

Finding the Fourth Proportional to 11,164.40, 15,407.12 and 6,688.56

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Solution

The fourth proportional to 11,164.40, 15,407.12 and 6,688.56 is: 9,230.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,164.40 : 15,407.12 = 6,688.56 : x
  2. Step 2: Convert to fraction form
    11,164.40/15,407.12 = 6,688.56/x
  3. Step 3: Cross multiply
    11,164.40x = 15,407.12 × 6,688.56
  4. Step 4: Simplify right side
    11,164.40x = 103,051,446.55
  5. Step 5: Solve for x
    x = 103,051,446.55/11,164.40
  6. Step 6: Final answer
    x = 9,230.36

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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.