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Finding the Fourth Proportional to 38,752.80, 58,129.20 and 11,047.20

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Solution

The fourth proportional to 38,752.80, 58,129.20 and 11,047.20 is: 16,570.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    38,752.80 : 58,129.20 = 11,047.20 : x
  2. Step 2: Convert to fraction form
    38,752.80/58,129.20 = 11,047.20/x
  3. Step 3: Cross multiply
    38,752.80x = 58,129.20 × 11,047.20
  4. Step 4: Simplify right side
    38,752.80x = 642,164,898.24
  5. Step 5: Solve for x
    x = 642,164,898.24/38,752.80
  6. Step 6: Final answer
    x = 16,570.80

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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.