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Finding the Fourth Proportional to 28,161, 38,862.18 and 15,586.56

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Solution

The fourth proportional to 28,161, 38,862.18 and 15,586.56 is: 21,509.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,161 : 38,862.18 = 15,586.56 : x
  2. Step 2: Convert to fraction form
    28,161/38,862.18 = 15,586.56/x
  3. Step 3: Cross multiply
    28,161x = 38,862.18 × 15,586.56
  4. Step 4: Simplify right side
    28,161x = 605,727,700.30
  5. Step 5: Solve for x
    x = 605,727,700.30/28,161
  6. Step 6: Final answer
    x = 21,509.45

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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.