Home / 27,890-38,488.24-15,315.60

Finding the Fourth Proportional to 27,890, 38,488.24 and 15,315.60

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Solution

The fourth proportional to 27,890, 38,488.24 and 15,315.60 is: 21,135.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890 : 38,488.24 = 15,315.60 : x
  2. Step 2: Convert to fraction form
    27,890/38,488.24 = 15,315.60/x
  3. Step 3: Cross multiply
    27,890x = 38,488.24 × 15,315.60
  4. Step 4: Simplify right side
    27,890x = 589,470,488.54
  5. Step 5: Solve for x
    x = 589,470,488.54/27,890
  6. Step 6: Final answer
    x = 21,135.55

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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.