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Finding the Fourth Proportional to 8,488.95, 12,741.53 and 5,208.45

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Solution

The fourth proportional to 8,488.95, 12,741.53 and 5,208.45 is: 7,817.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,488.95 : 12,741.53 = 5,208.45 : x
  2. Step 2: Convert to fraction form
    8,488.95/12,741.53 = 5,208.45/x
  3. Step 3: Cross multiply
    8,488.95x = 12,741.53 × 5,208.45
  4. Step 4: Simplify right side
    8,488.95x = 66,363,621.93
  5. Step 5: Solve for x
    x = 66,363,621.93/8,488.95
  6. Step 6: Final answer
    x = 7,817.65

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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.