Home / 21,987.86-32,981.37-5,347.77

Finding the Fourth Proportional to 21,987.86, 32,981.37 and 5,347.77

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Solution

The fourth proportional to 21,987.86, 32,981.37 and 5,347.77 is: 8,021.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.86 : 32,981.37 = 5,347.77 : x
  2. Step 2: Convert to fraction form
    21,987.86/32,981.37 = 5,347.77/x
  3. Step 3: Cross multiply
    21,987.86x = 32,981.37 × 5,347.77
  4. Step 4: Simplify right side
    21,987.86x = 176,376,781.04
  5. Step 5: Solve for x
    x = 176,376,781.04/21,987.86
  6. Step 6: Final answer
    x = 8,021.55

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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.