Home / 13,151.28-18,146.36-7,485.70

Finding the Fourth Proportional to 13,151.28, 18,146.36 and 7,485.70

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Solution

The fourth proportional to 13,151.28, 18,146.36 and 7,485.70 is: 10,328.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,151.28 : 18,146.36 = 7,485.70 : x
  2. Step 2: Convert to fraction form
    13,151.28/18,146.36 = 7,485.70/x
  3. Step 3: Cross multiply
    13,151.28x = 18,146.36 × 7,485.70
  4. Step 4: Simplify right side
    13,151.28x = 135,838,207.05
  5. Step 5: Solve for x
    x = 135,838,207.05/13,151.28
  6. Step 6: Final answer
    x = 10,328.90

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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.