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Finding the Fourth Proportional to 15,666.55, 23,480.38 and 7,760.55

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Solution

The fourth proportional to 15,666.55, 23,480.38 and 7,760.55 is: 11,631.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,666.55 : 23,480.38 = 7,760.55 : x
  2. Step 2: Convert to fraction form
    15,666.55/23,480.38 = 7,760.55/x
  3. Step 3: Cross multiply
    15,666.55x = 23,480.38 × 7,760.55
  4. Step 4: Simplify right side
    15,666.55x = 182,220,663.01
  5. Step 5: Solve for x
    x = 182,220,663.01/15,666.55
  6. Step 6: Final answer
    x = 11,631.19

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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.