Home / 10,989.68-15,168.60-6,742.16

Finding the Fourth Proportional to 10,989.68, 15,168.60 and 6,742.16

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Solution

The fourth proportional to 10,989.68, 15,168.60 and 6,742.16 is: 9,305.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,989.68 : 15,168.60 = 6,742.16 : x
  2. Step 2: Convert to fraction form
    10,989.68/15,168.60 = 6,742.16/x
  3. Step 3: Cross multiply
    10,989.68x = 15,168.60 × 6,742.16
  4. Step 4: Simplify right side
    10,989.68x = 102,269,128.18
  5. Step 5: Solve for x
    x = 102,269,128.18/10,989.68
  6. Step 6: Final answer
    x = 9,305.92

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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.