Home / 21,988.86-32,986.80-7,947.47

Finding the Fourth Proportional to 21,988.86, 32,986.80 and 7,947.47

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Solution

The fourth proportional to 21,988.86, 32,986.80 and 7,947.47 is: 11,922.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,988.86 : 32,986.80 = 7,947.47 : x
  2. Step 2: Convert to fraction form
    21,988.86/32,986.80 = 7,947.47/x
  3. Step 3: Cross multiply
    21,988.86x = 32,986.80 × 7,947.47
  4. Step 4: Simplify right side
    21,988.86x = 262,161,603.40
  5. Step 5: Solve for x
    x = 262,161,603.40/21,988.86
  6. Step 6: Final answer
    x = 11,922.47

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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.