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Finding the Fourth Proportional to 15,049.61, 20,790.07 and 12,020.75

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Solution

The fourth proportional to 15,049.61, 20,790.07 and 12,020.75 is: 16,605.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,049.61 : 20,790.07 = 12,020.75 : x
  2. Step 2: Convert to fraction form
    15,049.61/20,790.07 = 12,020.75/x
  3. Step 3: Cross multiply
    15,049.61x = 20,790.07 × 12,020.75
  4. Step 4: Simplify right side
    15,049.61x = 249,912,130.00
  5. Step 5: Solve for x
    x = 249,912,130.00/15,049.61
  6. Step 6: Final answer
    x = 16,605.89

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.