Home / 39,435.78-54,420.62-21,530.90

Finding the Fourth Proportional to 39,435.78, 54,420.62 and 21,530.90

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Solution

The fourth proportional to 39,435.78, 54,420.62 and 21,530.90 is: 29,712.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,435.78 : 54,420.62 = 21,530.90 : x
  2. Step 2: Convert to fraction form
    39,435.78/54,420.62 = 21,530.90/x
  3. Step 3: Cross multiply
    39,435.78x = 54,420.62 × 21,530.90
  4. Step 4: Simplify right side
    39,435.78x = 1,171,724,927.16
  5. Step 5: Solve for x
    x = 1,171,724,927.16/39,435.78
  6. Step 6: Final answer
    x = 29,712.23

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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.