Home / 21,987.86-32,985.30-7,946.47

Finding the Fourth Proportional to 21,987.86, 32,985.30 and 7,946.47

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Solution

The fourth proportional to 21,987.86, 32,985.30 and 7,946.47 is: 11,920.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,987.86 : 32,985.30 = 7,946.47 : x
  2. Step 2: Convert to fraction form
    21,987.86/32,985.30 = 7,946.47/x
  3. Step 3: Cross multiply
    21,987.86x = 32,985.30 × 7,946.47
  4. Step 4: Simplify right side
    21,987.86x = 262,116,584.63
  5. Step 5: Solve for x
    x = 262,116,584.63/21,987.86
  6. Step 6: Final answer
    x = 11,920.97

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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.