Home / 13,757.76-18,985.12-7,789.12

Finding the Fourth Proportional to 13,757.76, 18,985.12 and 7,789.12

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Solution

The fourth proportional to 13,757.76, 18,985.12 and 7,789.12 is: 10,748.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,757.76 : 18,985.12 = 7,789.12 : x
  2. Step 2: Convert to fraction form
    13,757.76/18,985.12 = 7,789.12/x
  3. Step 3: Cross multiply
    13,757.76x = 18,985.12 × 7,789.12
  4. Step 4: Simplify right side
    13,757.76x = 147,877,377.89
  5. Step 5: Solve for x
    x = 147,877,377.89/13,757.76
  6. Step 6: Final answer
    x = 10,748.65

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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.