Home / 7,715.79-11,573.68-1,872.35

Finding the Fourth Proportional to 7,715.79, 11,573.68 and 1,872.35

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Solution

The fourth proportional to 7,715.79, 11,573.68 and 1,872.35 is: 2,808.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.79 : 11,573.68 = 1,872.35 : x
  2. Step 2: Convert to fraction form
    7,715.79/11,573.68 = 1,872.35/x
  3. Step 3: Cross multiply
    7,715.79x = 11,573.68 × 1,872.35
  4. Step 4: Simplify right side
    7,715.79x = 21,669,979.75
  5. Step 5: Solve for x
    x = 21,669,979.75/7,715.79
  6. Step 6: Final answer
    x = 2,808.52

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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.