Home / 20,258.75-27,956.35-11,307.78

Finding the Fourth Proportional to 20,258.75, 27,956.35 and 11,307.78

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Solution

The fourth proportional to 20,258.75, 27,956.35 and 11,307.78 is: 15,604.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,258.75 : 27,956.35 = 11,307.78 : x
  2. Step 2: Convert to fraction form
    20,258.75/27,956.35 = 11,307.78/x
  3. Step 3: Cross multiply
    20,258.75x = 27,956.35 × 11,307.78
  4. Step 4: Simplify right side
    20,258.75x = 316,124,255.40
  5. Step 5: Solve for x
    x = 316,124,255.40/20,258.75
  6. Step 6: Final answer
    x = 15,604.33

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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.