Home / 27,708.31-38,188.02-20,977.81

Finding the Fourth Proportional to 27,708.31, 38,188.02 and 20,977.81

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Solution

The fourth proportional to 27,708.31, 38,188.02 and 20,977.81 is: 28,911.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    27,708.31 : 38,188.02 = 20,977.81 : x
  2. Step 2: Convert to fraction form
    27,708.31/38,188.02 = 20,977.81/x
  3. Step 3: Cross multiply
    27,708.31x = 38,188.02 × 20,977.81
  4. Step 4: Simplify right side
    27,708.31x = 801,101,027.84
  5. Step 5: Solve for x
    x = 801,101,027.84/27,708.31
  6. Step 6: Final answer
    x = 28,911.94

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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.