Home / 30,787.36-42,486.55-16,640.20

Finding the Fourth Proportional to 30,787.36, 42,486.55 and 16,640.20

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Solution

The fourth proportional to 30,787.36, 42,486.55 and 16,640.20 is: 22,963.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,787.36 : 42,486.55 = 16,640.20 : x
  2. Step 2: Convert to fraction form
    30,787.36/42,486.55 = 16,640.20/x
  3. Step 3: Cross multiply
    30,787.36x = 42,486.55 × 16,640.20
  4. Step 4: Simplify right side
    30,787.36x = 706,984,796.91
  5. Step 5: Solve for x
    x = 706,984,796.91/30,787.36
  6. Step 6: Final answer
    x = 22,963.48

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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.