Home / 28,378.44-39,124.08-19,869.12

Finding the Fourth Proportional to 28,378.44, 39,124.08 and 19,869.12

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Solution

The fourth proportional to 28,378.44, 39,124.08 and 19,869.12 is: 27,392.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,378.44 : 39,124.08 = 19,869.12 : x
  2. Step 2: Convert to fraction form
    28,378.44/39,124.08 = 19,869.12/x
  3. Step 3: Cross multiply
    28,378.44x = 39,124.08 × 19,869.12
  4. Step 4: Simplify right side
    28,378.44x = 777,361,040.41
  5. Step 5: Solve for x
    x = 777,361,040.41/28,378.44
  6. Step 6: Final answer
    x = 27,392.66

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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.