Home / 39,479.29-54,479.10-21,574.43

Finding the Fourth Proportional to 39,479.29, 54,479.10 and 21,574.43

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Solution

The fourth proportional to 39,479.29, 54,479.10 and 21,574.43 is: 29,771.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,479.29 : 54,479.10 = 21,574.43 : x
  2. Step 2: Convert to fraction form
    39,479.29/54,479.10 = 21,574.43/x
  3. Step 3: Cross multiply
    39,479.29x = 54,479.10 × 21,574.43
  4. Step 4: Simplify right side
    39,479.29x = 1,175,355,529.41
  5. Step 5: Solve for x
    x = 1,175,355,529.41/39,479.29
  6. Step 6: Final answer
    x = 29,771.45

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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.