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Finding the Fourth Proportional to 9,354.80, 12,908.48 and 5,162.78

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Solution

The fourth proportional to 9,354.80, 12,908.48 and 5,162.78 is: 7,124.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,354.80 : 12,908.48 = 5,162.78 : x
  2. Step 2: Convert to fraction form
    9,354.80/12,908.48 = 5,162.78/x
  3. Step 3: Cross multiply
    9,354.80x = 12,908.48 × 5,162.78
  4. Step 4: Simplify right side
    9,354.80x = 66,643,642.37
  5. Step 5: Solve for x
    x = 66,643,642.37/9,354.80
  6. Step 6: Final answer
    x = 7,124.01

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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.