Home / 13,640.80-18,824.12-7,672.46

Finding the Fourth Proportional to 13,640.80, 18,824.12 and 7,672.46

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Solution

The fourth proportional to 13,640.80, 18,824.12 and 7,672.46 is: 10,587.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,640.80 : 18,824.12 = 7,672.46 : x
  2. Step 2: Convert to fraction form
    13,640.80/18,824.12 = 7,672.46/x
  3. Step 3: Cross multiply
    13,640.80x = 18,824.12 × 7,672.46
  4. Step 4: Simplify right side
    13,640.80x = 144,427,316.43
  5. Step 5: Solve for x
    x = 144,427,316.43/13,640.80
  6. Step 6: Final answer
    x = 10,587.89

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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.