Home / 19,987.82-29,971.70-6,656.12

Finding the Fourth Proportional to 19,987.82, 29,971.70 and 6,656.12

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Solution

The fourth proportional to 19,987.82, 29,971.70 and 6,656.12 is: 9,980.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,987.82 : 29,971.70 = 6,656.12 : x
  2. Step 2: Convert to fraction form
    19,987.82/29,971.70 = 6,656.12/x
  3. Step 3: Cross multiply
    19,987.82x = 29,971.70 × 6,656.12
  4. Step 4: Simplify right side
    19,987.82x = 199,495,139.16
  5. Step 5: Solve for x
    x = 199,495,139.16/19,987.82
  6. Step 6: Final answer
    x = 9,980.83

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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.