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Finding the Fourth Proportional to 10,679.80, 16,019.55 and 4,836.40

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Solution

The fourth proportional to 10,679.80, 16,019.55 and 4,836.40 is: 7,254.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,679.80 : 16,019.55 = 4,836.40 : x
  2. Step 2: Convert to fraction form
    10,679.80/16,019.55 = 4,836.40/x
  3. Step 3: Cross multiply
    10,679.80x = 16,019.55 × 4,836.40
  4. Step 4: Simplify right side
    10,679.80x = 77,476,951.62
  5. Step 5: Solve for x
    x = 77,476,951.62/10,679.80
  6. Step 6: Final answer
    x = 7,254.53

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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.