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Finding the Fourth Proportional to 10,605.80, 15,903.90 and 4,759.40

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Solution

The fourth proportional to 10,605.80, 15,903.90 and 4,759.40 is: 7,136.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,605.80 : 15,903.90 = 4,759.40 : x
  2. Step 2: Convert to fraction form
    10,605.80/15,903.90 = 4,759.40/x
  3. Step 3: Cross multiply
    10,605.80x = 15,903.90 × 4,759.40
  4. Step 4: Simplify right side
    10,605.80x = 75,693,021.66
  5. Step 5: Solve for x
    x = 75,693,021.66/10,605.80
  6. Step 6: Final answer
    x = 7,136.95

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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.