Home / 51,987.16-77,988.90-16,918.60

Finding the Fourth Proportional to 51,987.16, 77,988.90 and 16,918.60

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Solution

The fourth proportional to 51,987.16, 77,988.90 and 16,918.60 is: 25,380.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    51,987.16 : 77,988.90 = 16,918.60 : x
  2. Step 2: Convert to fraction form
    51,987.16/77,988.90 = 16,918.60/x
  3. Step 3: Cross multiply
    51,987.16x = 77,988.90 × 16,918.60
  4. Step 4: Simplify right side
    51,987.16x = 1,319,463,003.54
  5. Step 5: Solve for x
    x = 1,319,463,003.54/51,987.16
  6. Step 6: Final answer
    x = 25,380.56

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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.