Home / 5,272.90-7,909.74-1,985.38

Finding the Fourth Proportional to 5,272.90, 7,909.74 and 1,985.38

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Solution

The fourth proportional to 5,272.90, 7,909.74 and 1,985.38 is: 2,978.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,272.90 : 7,909.74 = 1,985.38 : x
  2. Step 2: Convert to fraction form
    5,272.90/7,909.74 = 1,985.38/x
  3. Step 3: Cross multiply
    5,272.90x = 7,909.74 × 1,985.38
  4. Step 4: Simplify right side
    5,272.90x = 15,703,839.60
  5. Step 5: Solve for x
    x = 15,703,839.60/5,272.90
  6. Step 6: Final answer
    x = 2,978.22

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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.