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Finding the Fourth Proportional to 10,605.80, 15,904.65 and 3,488.39

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Solution

The fourth proportional to 10,605.80, 15,904.65 and 3,488.39 is: 5,231.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,605.80 : 15,904.65 = 3,488.39 : x
  2. Step 2: Convert to fraction form
    10,605.80/15,904.65 = 3,488.39/x
  3. Step 3: Cross multiply
    10,605.80x = 15,904.65 × 3,488.39
  4. Step 4: Simplify right side
    10,605.80x = 55,481,542.49
  5. Step 5: Solve for x
    x = 55,481,542.49/10,605.80
  6. Step 6: Final answer
    x = 5,231.25

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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.