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Finding the Fourth Proportional to 15,818.59, 21,830.12 and 8,745.48

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Solution

The fourth proportional to 15,818.59, 21,830.12 and 8,745.48 is: 12,069.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,818.59 : 21,830.12 = 8,745.48 : x
  2. Step 2: Convert to fraction form
    15,818.59/21,830.12 = 8,745.48/x
  3. Step 3: Cross multiply
    15,818.59x = 21,830.12 × 8,745.48
  4. Step 4: Simplify right side
    15,818.59x = 190,914,877.86
  5. Step 5: Solve for x
    x = 190,914,877.86/15,818.59
  6. Step 6: Final answer
    x = 12,069.02

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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.