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Finding the Fourth Proportional to 19,659.78, 27,130.96 and 10,707.78

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Solution

The fourth proportional to 19,659.78, 27,130.96 and 10,707.78 is: 14,776.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,659.78 : 27,130.96 = 10,707.78 : x
  2. Step 2: Convert to fraction form
    19,659.78/27,130.96 = 10,707.78/x
  3. Step 3: Cross multiply
    19,659.78x = 27,130.96 × 10,707.78
  4. Step 4: Simplify right side
    19,659.78x = 290,512,350.87
  5. Step 5: Solve for x
    x = 290,512,350.87/19,659.78
  6. Step 6: Final answer
    x = 14,776.99

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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.