Home / 39,985.80-59,987.22-11,905.98

Finding the Fourth Proportional to 39,985.80, 59,987.22 and 11,905.98

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Solution

The fourth proportional to 39,985.80, 59,987.22 and 11,905.98 is: 17,861.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,985.80 : 59,987.22 = 11,905.98 : x
  2. Step 2: Convert to fraction form
    39,985.80/59,987.22 = 11,905.98/x
  3. Step 3: Cross multiply
    39,985.80x = 59,987.22 × 11,905.98
  4. Step 4: Simplify right side
    39,985.80x = 714,206,641.58
  5. Step 5: Solve for x
    x = 714,206,641.58/39,985.80
  6. Step 6: Final answer
    x = 17,861.51

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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.