Home / 21,070.82-31,615.46-9,985.43

Finding the Fourth Proportional to 21,070.82, 31,615.46 and 9,985.43

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Solution

The fourth proportional to 21,070.82, 31,615.46 and 9,985.43 is: 14,982.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,070.82 : 31,615.46 = 9,985.43 : x
  2. Step 2: Convert to fraction form
    21,070.82/31,615.46 = 9,985.43/x
  3. Step 3: Cross multiply
    21,070.82x = 31,615.46 × 9,985.43
  4. Step 4: Simplify right side
    21,070.82x = 315,693,962.75
  5. Step 5: Solve for x
    x = 315,693,962.75/21,070.82
  6. Step 6: Final answer
    x = 14,982.52

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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.