Home / 20,248.40-27,931.56-11,863.28

Finding the Fourth Proportional to 20,248.40, 27,931.56 and 11,863.28

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Solution

The fourth proportional to 20,248.40, 27,931.56 and 11,863.28 is: 16,364.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,248.40 : 27,931.56 = 11,863.28 : x
  2. Step 2: Convert to fraction form
    20,248.40/27,931.56 = 11,863.28/x
  3. Step 3: Cross multiply
    20,248.40x = 27,931.56 × 11,863.28
  4. Step 4: Simplify right side
    20,248.40x = 331,359,917.12
  5. Step 5: Solve for x
    x = 331,359,917.12/20,248.40
  6. Step 6: Final answer
    x = 16,364.75

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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.