Home / 7,988.64-11,975.10-2,987.34

Finding the Fourth Proportional to 7,988.64, 11,975.10 and 2,987.34

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Solution

The fourth proportional to 7,988.64, 11,975.10 and 2,987.34 is: 4,478.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,988.64 : 11,975.10 = 2,987.34 : x
  2. Step 2: Convert to fraction form
    7,988.64/11,975.10 = 2,987.34/x
  3. Step 3: Cross multiply
    7,988.64x = 11,975.10 × 2,987.34
  4. Step 4: Simplify right side
    7,988.64x = 35,773,695.23
  5. Step 5: Solve for x
    x = 35,773,695.23/7,988.64
  6. Step 6: Final answer
    x = 4,478.07

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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.