Home / 13,135.76-18,126.60-7,469.70

Finding the Fourth Proportional to 13,135.76, 18,126.60 and 7,469.70

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Solution

The fourth proportional to 13,135.76, 18,126.60 and 7,469.70 is: 10,307.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,135.76 : 18,126.60 = 7,469.70 : x
  2. Step 2: Convert to fraction form
    13,135.76/18,126.60 = 7,469.70/x
  3. Step 3: Cross multiply
    13,135.76x = 18,126.60 × 7,469.70
  4. Step 4: Simplify right side
    13,135.76x = 135,400,264.02
  5. Step 5: Solve for x
    x = 135,400,264.02/13,135.76
  6. Step 6: Final answer
    x = 10,307.76

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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.