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Finding the Fourth Proportional to 15,873.59, 21,905.55 and 8,799.99

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Solution

The fourth proportional to 15,873.59, 21,905.55 and 8,799.99 is: 12,143.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,873.59 : 21,905.55 = 8,799.99 : x
  2. Step 2: Convert to fraction form
    15,873.59/21,905.55 = 8,799.99/x
  3. Step 3: Cross multiply
    15,873.59x = 21,905.55 × 8,799.99
  4. Step 4: Simplify right side
    15,873.59x = 192,768,620.94
  5. Step 5: Solve for x
    x = 192,768,620.94/15,873.59
  6. Step 6: Final answer
    x = 12,143.99

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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.