Home / 10,380.18-15,567.84-5,109.78

Finding the Fourth Proportional to 10,380.18, 15,567.84 and 5,109.78

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Solution

The fourth proportional to 10,380.18, 15,567.84 and 5,109.78 is: 7,663.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,380.18 : 15,567.84 = 5,109.78 : x
  2. Step 2: Convert to fraction form
    10,380.18/15,567.84 = 5,109.78/x
  3. Step 3: Cross multiply
    10,380.18x = 15,567.84 × 5,109.78
  4. Step 4: Simplify right side
    10,380.18x = 79,548,237.48
  5. Step 5: Solve for x
    x = 79,548,237.48/10,380.18
  6. Step 6: Final answer
    x = 7,663.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.