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Finding the Fourth Proportional to 16,572.78, 22,878.90 and 12,787.44

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Solution

The fourth proportional to 16,572.78, 22,878.90 and 12,787.44 is: 17,653.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    16,572.78 : 22,878.90 = 12,787.44 : x
  2. Step 2: Convert to fraction form
    16,572.78/22,878.90 = 12,787.44/x
  3. Step 3: Cross multiply
    16,572.78x = 22,878.90 × 12,787.44
  4. Step 4: Simplify right side
    16,572.78x = 292,562,561.02
  5. Step 5: Solve for x
    x = 292,562,561.02/16,572.78
  6. Step 6: Final answer
    x = 17,653.20

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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.