Home / 39,479.34-54,479.19-21,574.50

Finding the Fourth Proportional to 39,479.34, 54,479.19 and 21,574.50

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Solution

The fourth proportional to 39,479.34, 54,479.19 and 21,574.50 is: 29,771.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,479.34 : 54,479.19 = 21,574.50 : x
  2. Step 2: Convert to fraction form
    39,479.34/54,479.19 = 21,574.50/x
  3. Step 3: Cross multiply
    39,479.34x = 54,479.19 × 21,574.50
  4. Step 4: Simplify right side
    39,479.34x = 1,175,361,284.66
  5. Step 5: Solve for x
    x = 1,175,361,284.66/39,479.34
  6. Step 6: Final answer
    x = 29,771.55

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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.