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Finding the Fourth Proportional to 28,666.90, 42,963.90 and 25,532.20

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Solution

The fourth proportional to 28,666.90, 42,963.90 and 25,532.20 is: 38,265.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,666.90 : 42,963.90 = 25,532.20 : x
  2. Step 2: Convert to fraction form
    28,666.90/42,963.90 = 25,532.20/x
  3. Step 3: Cross multiply
    28,666.90x = 42,963.90 × 25,532.20
  4. Step 4: Simplify right side
    28,666.90x = 1,096,962,887.58
  5. Step 5: Solve for x
    x = 1,096,962,887.58/28,666.90
  6. Step 6: Final answer
    x = 38,265.84

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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.