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Finding the Fourth Proportional to 21,846.95, 30,079.74 and 19,851.55

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Solution

The fourth proportional to 21,846.95, 30,079.74 and 19,851.55 is: 27,332.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,846.95 : 30,079.74 = 19,851.55 : x
  2. Step 2: Convert to fraction form
    21,846.95/30,079.74 = 19,851.55/x
  3. Step 3: Cross multiply
    21,846.95x = 30,079.74 × 19,851.55
  4. Step 4: Simplify right side
    21,846.95x = 597,129,350.18
  5. Step 5: Solve for x
    x = 597,129,350.18/21,846.95
  6. Step 6: Final answer
    x = 27,332.39

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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.