Home / 13,140.97-18,112.88-9,313.85

Finding the Fourth Proportional to 13,140.97, 18,112.88 and 9,313.85

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Solution

The fourth proportional to 13,140.97, 18,112.88 and 9,313.85 is: 12,837.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,140.97 : 18,112.88 = 9,313.85 : x
  2. Step 2: Convert to fraction form
    13,140.97/18,112.88 = 9,313.85/x
  3. Step 3: Cross multiply
    13,140.97x = 18,112.88 × 9,313.85
  4. Step 4: Simplify right side
    13,140.97x = 168,700,715.95
  5. Step 5: Solve for x
    x = 168,700,715.95/13,140.97
  6. Step 6: Final answer
    x = 12,837.77

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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.