Home / 27,890.25-38,488.82-15,315.27

Finding the Fourth Proportional to 27,890.25, 38,488.82 and 15,315.27

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Solution

The fourth proportional to 27,890.25, 38,488.82 and 15,315.27 is: 21,135.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,890.25 : 38,488.82 = 15,315.27 : x
  2. Step 2: Convert to fraction form
    27,890.25/38,488.82 = 15,315.27/x
  3. Step 3: Cross multiply
    27,890.25x = 38,488.82 × 15,315.27
  4. Step 4: Simplify right side
    27,890.25x = 589,466,593.71
  5. Step 5: Solve for x
    x = 589,466,593.71/27,890.25
  6. Step 6: Final answer
    x = 21,135.22

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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.