Home / 21,981.04-32,975.80-7,185.96

Finding the Fourth Proportional to 21,981.04, 32,975.80 and 7,185.96

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Solution

The fourth proportional to 21,981.04, 32,975.80 and 7,185.96 is: 10,780.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.04 : 32,975.80 = 7,185.96 : x
  2. Step 2: Convert to fraction form
    21,981.04/32,975.80 = 7,185.96/x
  3. Step 3: Cross multiply
    21,981.04x = 32,975.80 × 7,185.96
  4. Step 4: Simplify right side
    21,981.04x = 236,962,779.77
  5. Step 5: Solve for x
    x = 236,962,779.77/21,981.04
  6. Step 6: Final answer
    x = 10,780.33

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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.