Home / 9,690.72-13,376.40-5,712.96

Finding the Fourth Proportional to 9,690.72, 13,376.40 and 5,712.96

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Solution

The fourth proportional to 9,690.72, 13,376.40 and 5,712.96 is: 7,885.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,690.72 : 13,376.40 = 5,712.96 : x
  2. Step 2: Convert to fraction form
    9,690.72/13,376.40 = 5,712.96/x
  3. Step 3: Cross multiply
    9,690.72x = 13,376.40 × 5,712.96
  4. Step 4: Simplify right side
    9,690.72x = 76,418,838.14
  5. Step 5: Solve for x
    x = 76,418,838.14/9,690.72
  6. Step 6: Final answer
    x = 7,885.78

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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.