Home / 28,325.06-39,089.04-15,578.78

Finding the Fourth Proportional to 28,325.06, 39,089.04 and 15,578.78

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Solution

The fourth proportional to 28,325.06, 39,089.04 and 15,578.78 is: 21,498.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,325.06 : 39,089.04 = 15,578.78 : x
  2. Step 2: Convert to fraction form
    28,325.06/39,089.04 = 15,578.78/x
  3. Step 3: Cross multiply
    28,325.06x = 39,089.04 × 15,578.78
  4. Step 4: Simplify right side
    28,325.06x = 608,959,554.57
  5. Step 5: Solve for x
    x = 608,959,554.57/28,325.06
  6. Step 6: Final answer
    x = 21,498.97

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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.