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Finding the Fourth Proportional to 7,754.78, 10,701.50 and 4,218.00

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Solution

The fourth proportional to 7,754.78, 10,701.50 and 4,218.00 is: 5,820.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,754.78 : 10,701.50 = 4,218.00 : x
  2. Step 2: Convert to fraction form
    7,754.78/10,701.50 = 4,218.00/x
  3. Step 3: Cross multiply
    7,754.78x = 10,701.50 × 4,218.00
  4. Step 4: Simplify right side
    7,754.78x = 45,138,873.49
  5. Step 5: Solve for x
    x = 45,138,873.49/7,754.78
  6. Step 6: Final answer
    x = 5,820.78

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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.