Home / 21,987.40-32,957.86-7,192.36

Finding the Fourth Proportional to 21,987.40, 32,957.86 and 7,192.36

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Solution

The fourth proportional to 21,987.40, 32,957.86 and 7,192.36 is: 10,780.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.40 : 32,957.86 = 7,192.36 : x
  2. Step 2: Convert to fraction form
    21,987.40/32,957.86 = 7,192.36/x
  3. Step 3: Cross multiply
    21,987.40x = 32,957.86 × 7,192.36
  4. Step 4: Simplify right side
    21,987.40x = 237,044,793.95
  5. Step 5: Solve for x
    x = 237,044,793.95/21,987.40
  6. Step 6: Final answer
    x = 10,780.94

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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.