Home / 13,399.60-18,486.12-7,731.76

Finding the Fourth Proportional to 13,399.60, 18,486.12 and 7,731.76

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Solution

The fourth proportional to 13,399.60, 18,486.12 and 7,731.76 is: 10,666.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,399.60 : 18,486.12 = 7,731.76 : x
  2. Step 2: Convert to fraction form
    13,399.60/18,486.12 = 7,731.76/x
  3. Step 3: Cross multiply
    13,399.60x = 18,486.12 × 7,731.76
  4. Step 4: Simplify right side
    13,399.60x = 142,930,243.17
  5. Step 5: Solve for x
    x = 142,930,243.17/13,399.60
  6. Step 6: Final answer
    x = 10,666.75

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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.