Home / 19,851.82-29,778.40-9,985.72

Finding the Fourth Proportional to 19,851.82, 29,778.40 and 9,985.72

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Solution

The fourth proportional to 19,851.82, 29,778.40 and 9,985.72 is: 14,978.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,851.82 : 29,778.40 = 9,985.72 : x
  2. Step 2: Convert to fraction form
    19,851.82/29,778.40 = 9,985.72/x
  3. Step 3: Cross multiply
    19,851.82x = 29,778.40 × 9,985.72
  4. Step 4: Simplify right side
    19,851.82x = 297,358,764.45
  5. Step 5: Solve for x
    x = 297,358,764.45/19,851.82
  6. Step 6: Final answer
    x = 14,978.92

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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.