Home / 8,960.42-12,365.55-5,378.90

Finding the Fourth Proportional to 8,960.42, 12,365.55 and 5,378.90

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Solution

The fourth proportional to 8,960.42, 12,365.55 and 5,378.90 is: 7,422.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,960.42 : 12,365.55 = 5,378.90 : x
  2. Step 2: Convert to fraction form
    8,960.42/12,365.55 = 5,378.90/x
  3. Step 3: Cross multiply
    8,960.42x = 12,365.55 × 5,378.90
  4. Step 4: Simplify right side
    8,960.42x = 66,513,056.90
  5. Step 5: Solve for x
    x = 66,513,056.90/8,960.42
  6. Step 6: Final answer
    x = 7,422.98

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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.