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Finding the Fourth Proportional to 21,959.09, 32,938.71 and 5,319.09

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Solution

The fourth proportional to 21,959.09, 32,938.71 and 5,319.09 is: 7,978.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,959.09 : 32,938.71 = 5,319.09 : x
  2. Step 2: Convert to fraction form
    21,959.09/32,938.71 = 5,319.09/x
  3. Step 3: Cross multiply
    21,959.09x = 32,938.71 × 5,319.09
  4. Step 4: Simplify right side
    21,959.09x = 175,203,962.97
  5. Step 5: Solve for x
    x = 175,203,962.97/21,959.09
  6. Step 6: Final answer
    x = 7,978.65

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1.5x scale

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.