Home / 39,786.71-54,904.57-21,881.72

Finding the Fourth Proportional to 39,786.71, 54,904.57 and 21,881.72

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Solution

The fourth proportional to 39,786.71, 54,904.57 and 21,881.72 is: 30,196.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,786.71 : 54,904.57 = 21,881.72 : x
  2. Step 2: Convert to fraction form
    39,786.71/54,904.57 = 21,881.72/x
  3. Step 3: Cross multiply
    39,786.71x = 54,904.57 × 21,881.72
  4. Step 4: Simplify right side
    39,786.71x = 1,201,406,510.02
  5. Step 5: Solve for x
    x = 1,201,406,510.02/39,786.71
  6. Step 6: Final answer
    x = 30,196.17

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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.