Home / 39,081-53,931.42-21,175.95

Finding the Fourth Proportional to 39,081, 53,931.42 and 21,175.95

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Solution

The fourth proportional to 39,081, 53,931.42 and 21,175.95 is: 29,222.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,081 : 53,931.42 = 21,175.95 : x
  2. Step 2: Convert to fraction form
    39,081/53,931.42 = 21,175.95/x
  3. Step 3: Cross multiply
    39,081x = 53,931.42 × 21,175.95
  4. Step 4: Simplify right side
    39,081x = 1,142,049,053.35
  5. Step 5: Solve for x
    x = 1,142,049,053.35/39,081
  6. Step 6: Final answer
    x = 29,222.62

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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.