Home / 27,790.78-38,350.14-15,215.50

Finding the Fourth Proportional to 27,790.78, 38,350.14 and 15,215.50

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Solution

The fourth proportional to 27,790.78, 38,350.14 and 15,215.50 is: 20,996.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,790.78 : 38,350.14 = 15,215.50 : x
  2. Step 2: Convert to fraction form
    27,790.78/38,350.14 = 15,215.50/x
  3. Step 3: Cross multiply
    27,790.78x = 38,350.14 × 15,215.50
  4. Step 4: Simplify right side
    27,790.78x = 583,516,555.17
  5. Step 5: Solve for x
    x = 583,516,555.17/27,790.78
  6. Step 6: Final answer
    x = 20,996.77

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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.