Home / 27,786.50-38,345.40-15,211.28

Finding the Fourth Proportional to 27,786.50, 38,345.40 and 15,211.28

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Solution

The fourth proportional to 27,786.50, 38,345.40 and 15,211.28 is: 20,991.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,786.50 : 38,345.40 = 15,211.28 : x
  2. Step 2: Convert to fraction form
    27,786.50/38,345.40 = 15,211.28/x
  3. Step 3: Cross multiply
    27,786.50x = 38,345.40 × 15,211.28
  4. Step 4: Simplify right side
    27,786.50x = 583,282,616.11
  5. Step 5: Solve for x
    x = 583,282,616.11/27,786.50
  6. Step 6: Final answer
    x = 20,991.58

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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.