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Finding the Fourth Proportional to 33,312.80, 45,978.08 and 21,391.20

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Solution

The fourth proportional to 33,312.80, 45,978.08 and 21,391.20 is: 29,523.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    33,312.80 : 45,978.08 = 21,391.20 : x
  2. Step 2: Convert to fraction form
    33,312.80/45,978.08 = 21,391.20/x
  3. Step 3: Cross multiply
    33,312.80x = 45,978.08 × 21,391.20
  4. Step 4: Simplify right side
    33,312.80x = 983,526,304.90
  5. Step 5: Solve for x
    x = 983,526,304.90/33,312.80
  6. Step 6: Final answer
    x = 29,523.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.