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Finding the Fourth Proportional to 39,563.80, 59,353.80 and 13,287.40

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Solution

The fourth proportional to 39,563.80, 59,353.80 and 13,287.40 is: 19,933.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,563.80 : 59,353.80 = 13,287.40 : x
  2. Step 2: Convert to fraction form
    39,563.80/59,353.80 = 13,287.40/x
  3. Step 3: Cross multiply
    39,563.80x = 59,353.80 × 13,287.40
  4. Step 4: Simplify right side
    39,563.80x = 788,657,682.12
  5. Step 5: Solve for x
    x = 788,657,682.12/39,563.80
  6. Step 6: Final answer
    x = 19,933.82

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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.