Home / 8,987.62-12,361.80-7,215.34

Finding the Fourth Proportional to 8,987.62, 12,361.80 and 7,215.34

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Solution

The fourth proportional to 8,987.62, 12,361.80 and 7,215.34 is: 9,924.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,987.62 : 12,361.80 = 7,215.34 : x
  2. Step 2: Convert to fraction form
    8,987.62/12,361.80 = 7,215.34/x
  3. Step 3: Cross multiply
    8,987.62x = 12,361.80 × 7,215.34
  4. Step 4: Simplify right side
    8,987.62x = 89,194,590.01
  5. Step 5: Solve for x
    x = 89,194,590.01/8,987.62
  6. Step 6: Final answer
    x = 9,924.16

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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.