Home / 11,565.09-15,956.30-7,087.20

Finding the Fourth Proportional to 11,565.09, 15,956.30 and 7,087.20

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Solution

The fourth proportional to 11,565.09, 15,956.30 and 7,087.20 is: 9,778.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,565.09 : 15,956.30 = 7,087.20 : x
  2. Step 2: Convert to fraction form
    11,565.09/15,956.30 = 7,087.20/x
  3. Step 3: Cross multiply
    11,565.09x = 15,956.30 × 7,087.20
  4. Step 4: Simplify right side
    11,565.09x = 113,085,453.92
  5. Step 5: Solve for x
    x = 113,085,453.92/11,565.09
  6. Step 6: Final answer
    x = 9,778.17

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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.