Home / 13,385.64-18,472.49-7,720.62

Finding the Fourth Proportional to 13,385.64, 18,472.49 and 7,720.62

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Solution

The fourth proportional to 13,385.64, 18,472.49 and 7,720.62 is: 10,654.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,385.64 : 18,472.49 = 7,720.62 : x
  2. Step 2: Convert to fraction form
    13,385.64/18,472.49 = 7,720.62/x
  3. Step 3: Cross multiply
    13,385.64x = 18,472.49 × 7,720.62
  4. Step 4: Simplify right side
    13,385.64x = 142,619,037.14
  5. Step 5: Solve for x
    x = 142,619,037.14/13,385.64
  6. Step 6: Final answer
    x = 10,654.63

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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.