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Finding the Fourth Proportional to 35,661.78, 49,218.45 and 20,551.56

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Solution

The fourth proportional to 35,661.78, 49,218.45 and 20,551.56 is: 28,364.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    35,661.78 : 49,218.45 = 20,551.56 : x
  2. Step 2: Convert to fraction form
    35,661.78/49,218.45 = 20,551.56/x
  3. Step 3: Cross multiply
    35,661.78x = 49,218.45 × 20,551.56
  4. Step 4: Simplify right side
    35,661.78x = 1,011,515,928.28
  5. Step 5: Solve for x
    x = 1,011,515,928.28/35,661.78
  6. Step 6: Final answer
    x = 28,364.15

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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.