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Finding the Fourth Proportional to 22,255, 33,356.56 and 12,389.56

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Solution

The fourth proportional to 22,255, 33,356.56 and 12,389.56 is: 18,569.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,255 : 33,356.56 = 12,389.56 : x
  2. Step 2: Convert to fraction form
    22,255/33,356.56 = 12,389.56/x
  3. Step 3: Cross multiply
    22,255x = 33,356.56 × 12,389.56
  4. Step 4: Simplify right side
    22,255x = 413,273,101.51
  5. Step 5: Solve for x
    x = 413,273,101.51/22,255
  6. Step 6: Final answer
    x = 18,569.90

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.