Home / 21,987.07-30,342.04-11,915.25

Finding the Fourth Proportional to 21,987.07, 30,342.04 and 11,915.25

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Solution

The fourth proportional to 21,987.07, 30,342.04 and 11,915.25 is: 16,442.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.07 : 30,342.04 = 11,915.25 : x
  2. Step 2: Convert to fraction form
    21,987.07/30,342.04 = 11,915.25/x
  3. Step 3: Cross multiply
    21,987.07x = 30,342.04 × 11,915.25
  4. Step 4: Simplify right side
    21,987.07x = 361,532,848.54
  5. Step 5: Solve for x
    x = 361,532,848.54/21,987.07
  6. Step 6: Final answer
    x = 16,442.98

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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.