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Finding the Fourth Proportional to 19,659.78, 27,149.78 and 16,810.70

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Solution

The fourth proportional to 19,659.78, 27,149.78 and 16,810.70 is: 23,215.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.78 : 27,149.78 = 16,810.70 : x
  2. Step 2: Convert to fraction form
    19,659.78/27,149.78 = 16,810.70/x
  3. Step 3: Cross multiply
    19,659.78x = 27,149.78 × 16,810.70
  4. Step 4: Simplify right side
    19,659.78x = 456,406,790.47
  5. Step 5: Solve for x
    x = 456,406,790.47/19,659.78
  6. Step 6: Final answer
    x = 23,215.25

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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.