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Finding the Fourth Proportional to 21,984.80, 32,915.10 and 17,111.30

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Solution

The fourth proportional to 21,984.80, 32,915.10 and 17,111.30 is: 25,618.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,984.80 : 32,915.10 = 17,111.30 : x
  2. Step 2: Convert to fraction form
    21,984.80/32,915.10 = 17,111.30/x
  3. Step 3: Cross multiply
    21,984.80x = 32,915.10 × 17,111.30
  4. Step 4: Simplify right side
    21,984.80x = 563,220,150.63
  5. Step 5: Solve for x
    x = 563,220,150.63/21,984.80
  6. Step 6: Final answer
    x = 25,618.62

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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.