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Finding the Fourth Proportional to 8,579.12, 12,868.07 and 5,620.59

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Solution

The fourth proportional to 8,579.12, 12,868.07 and 5,620.59 is: 8,430.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,579.12 : 12,868.07 = 5,620.59 : x
  2. Step 2: Convert to fraction form
    8,579.12/12,868.07 = 5,620.59/x
  3. Step 3: Cross multiply
    8,579.12x = 12,868.07 × 5,620.59
  4. Step 4: Simplify right side
    8,579.12x = 72,326,117.46
  5. Step 5: Solve for x
    x = 72,326,117.46/8,579.12
  6. Step 6: Final answer
    x = 8,430.49

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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.