Home / 39,145.78-54,020.99-21,240.74

Finding the Fourth Proportional to 39,145.78, 54,020.99 and 21,240.74

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Solution

The fourth proportional to 39,145.78, 54,020.99 and 21,240.74 is: 29,312.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,145.78 : 54,020.99 = 21,240.74 : x
  2. Step 2: Convert to fraction form
    39,145.78/54,020.99 = 21,240.74/x
  3. Step 3: Cross multiply
    39,145.78x = 54,020.99 × 21,240.74
  4. Step 4: Simplify right side
    39,145.78x = 1,147,445,991.29
  5. Step 5: Solve for x
    x = 1,147,445,991.29/39,145.78
  6. Step 6: Final answer
    x = 29,312.13

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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.