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Finding the Fourth Proportional to 21,799.92, 30,084.60 and 12,368.88

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Solution

The fourth proportional to 21,799.92, 30,084.60 and 12,368.88 is: 17,069.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,799.92 : 30,084.60 = 12,368.88 : x
  2. Step 2: Convert to fraction form
    21,799.92/30,084.60 = 12,368.88/x
  3. Step 3: Cross multiply
    21,799.92x = 30,084.60 × 12,368.88
  4. Step 4: Simplify right side
    21,799.92x = 372,112,807.25
  5. Step 5: Solve for x
    x = 372,112,807.25/21,799.92
  6. Step 6: Final answer
    x = 17,069.46

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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.