Home / 9,987.92-13,777.80-7,008.20

Finding the Fourth Proportional to 9,987.92, 13,777.80 and 7,008.20

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Solution

The fourth proportional to 9,987.92, 13,777.80 and 7,008.20 is: 9,667.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,987.92 : 13,777.80 = 7,008.20 : x
  2. Step 2: Convert to fraction form
    9,987.92/13,777.80 = 7,008.20/x
  3. Step 3: Cross multiply
    9,987.92x = 13,777.80 × 7,008.20
  4. Step 4: Simplify right side
    9,987.92x = 96,557,577.96
  5. Step 5: Solve for x
    x = 96,557,577.96/9,987.92
  6. Step 6: Final answer
    x = 9,667.44

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.