Home / 8,960.13-12,370.53-5,778.90

Finding the Fourth Proportional to 8,960.13, 12,370.53 and 5,778.90

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Solution

The fourth proportional to 8,960.13, 12,370.53 and 5,778.90 is: 7,978.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,960.13 : 12,370.53 = 5,778.90 : x
  2. Step 2: Convert to fraction form
    8,960.13/12,370.53 = 5,778.90/x
  3. Step 3: Cross multiply
    8,960.13x = 12,370.53 × 5,778.90
  4. Step 4: Simplify right side
    8,960.13x = 71,488,055.82
  5. Step 5: Solve for x
    x = 71,488,055.82/8,960.13
  6. Step 6: Final answer
    x = 7,978.46

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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.