Home / 39,111.75-53,974.40-21,206.70

Finding the Fourth Proportional to 39,111.75, 53,974.40 and 21,206.70

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Solution

The fourth proportional to 39,111.75, 53,974.40 and 21,206.70 is: 29,265.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,111.75 : 53,974.40 = 21,206.70 : x
  2. Step 2: Convert to fraction form
    39,111.75/53,974.40 = 21,206.70/x
  3. Step 3: Cross multiply
    39,111.75x = 53,974.40 × 21,206.70
  4. Step 4: Simplify right side
    39,111.75x = 1,144,618,908.48
  5. Step 5: Solve for x
    x = 1,144,618,908.48/39,111.75
  6. Step 6: Final answer
    x = 29,265.35

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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.