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Finding the Fourth Proportional to 39,368.80, 59,061.30 and 13,092.40

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Solution

The fourth proportional to 39,368.80, 59,061.30 and 13,092.40 is: 19,641.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,368.80 : 59,061.30 = 13,092.40 : x
  2. Step 2: Convert to fraction form
    39,368.80/59,061.30 = 13,092.40/x
  3. Step 3: Cross multiply
    39,368.80x = 59,061.30 × 13,092.40
  4. Step 4: Simplify right side
    39,368.80x = 773,254,164.12
  5. Step 5: Solve for x
    x = 773,254,164.12/39,368.80
  6. Step 6: Final answer
    x = 19,641.29

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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.