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Finding the Fourth Proportional to 18,899.92, 26,070.42 and 11,820.52

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Solution

The fourth proportional to 18,899.92, 26,070.42 and 11,820.52 is: 16,305.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,899.92 : 26,070.42 = 11,820.52 : x
  2. Step 2: Convert to fraction form
    18,899.92/26,070.42 = 11,820.52/x
  3. Step 3: Cross multiply
    18,899.92x = 26,070.42 × 11,820.52
  4. Step 4: Simplify right side
    18,899.92x = 308,165,921.02
  5. Step 5: Solve for x
    x = 308,165,921.02/18,899.92
  6. Step 6: Final answer
    x = 16,305.14

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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.