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Finding the Fourth Proportional to 8,478.88, 11,700.84 and 4,941.40

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Solution

The fourth proportional to 8,478.88, 11,700.84 and 4,941.40 is: 6,819.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,478.88 : 11,700.84 = 4,941.40 : x
  2. Step 2: Convert to fraction form
    8,478.88/11,700.84 = 4,941.40/x
  3. Step 3: Cross multiply
    8,478.88x = 11,700.84 × 4,941.40
  4. Step 4: Simplify right side
    8,478.88x = 57,818,530.78
  5. Step 5: Solve for x
    x = 57,818,530.78/8,478.88
  6. Step 6: Final answer
    x = 6,819.12

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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.