Home / 39,340.78-54,289.59-21,435.92

Finding the Fourth Proportional to 39,340.78, 54,289.59 and 21,435.92

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Solution

The fourth proportional to 39,340.78, 54,289.59 and 21,435.92 is: 29,581.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,340.78 : 54,289.59 = 21,435.92 : x
  2. Step 2: Convert to fraction form
    39,340.78/54,289.59 = 21,435.92/x
  3. Step 3: Cross multiply
    39,340.78x = 54,289.59 × 21,435.92
  4. Step 4: Simplify right side
    39,340.78x = 1,163,747,308.07
  5. Step 5: Solve for x
    x = 1,163,747,308.07/39,340.78
  6. Step 6: Final answer
    x = 29,581.20

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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.