Home / 39,220.49-54,124.40-21,315.11

Finding the Fourth Proportional to 39,220.49, 54,124.40 and 21,315.11

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Solution

The fourth proportional to 39,220.49, 54,124.40 and 21,315.11 is: 29,414.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,220.49 : 54,124.40 = 21,315.11 : x
  2. Step 2: Convert to fraction form
    39,220.49/54,124.40 = 21,315.11/x
  3. Step 3: Cross multiply
    39,220.49x = 54,124.40 × 21,315.11
  4. Step 4: Simplify right side
    39,220.49x = 1,153,667,322.35
  5. Step 5: Solve for x
    x = 1,153,667,322.35/39,220.49
  6. Step 6: Final answer
    x = 29,414.91

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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.