Home / 39,490.78-54,495.38-21,585.79

Finding the Fourth Proportional to 39,490.78, 54,495.38 and 21,585.79

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Solution

The fourth proportional to 39,490.78, 54,495.38 and 21,585.79 is: 29,787.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,490.78 : 54,495.38 = 21,585.79 : x
  2. Step 2: Convert to fraction form
    39,490.78/54,495.38 = 21,585.79/x
  3. Step 3: Cross multiply
    39,490.78x = 54,495.38 × 21,585.79
  4. Step 4: Simplify right side
    39,490.78x = 1,176,325,584.48
  5. Step 5: Solve for x
    x = 1,176,325,584.48/39,490.78
  6. Step 6: Final answer
    x = 29,787.35

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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.