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Finding the Fourth Proportional to 8,551.68, 12,809.52 and 5,430.12

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Solution

The fourth proportional to 8,551.68, 12,809.52 and 5,430.12 is: 8,133.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,551.68 : 12,809.52 = 5,430.12 : x
  2. Step 2: Convert to fraction form
    8,551.68/12,809.52 = 5,430.12/x
  3. Step 3: Cross multiply
    8,551.68x = 12,809.52 × 5,430.12
  4. Step 4: Simplify right side
    8,551.68x = 69,557,230.74
  5. Step 5: Solve for x
    x = 69,557,230.74/8,551.68
  6. Step 6: Final answer
    x = 8,133.75

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.