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Finding the Fourth Proportional to 7,955.72, 10,978.70 and 4,418.86

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Solution

The fourth proportional to 7,955.72, 10,978.70 and 4,418.86 is: 6,097.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,955.72 : 10,978.70 = 4,418.86 : x
  2. Step 2: Convert to fraction form
    7,955.72/10,978.70 = 4,418.86/x
  3. Step 3: Cross multiply
    7,955.72x = 10,978.70 × 4,418.86
  4. Step 4: Simplify right side
    7,955.72x = 48,513,338.28
  5. Step 5: Solve for x
    x = 48,513,338.28/7,955.72
  6. Step 6: Final answer
    x = 6,097.92

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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.