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Finding the Fourth Proportional to 7,578.72, 11,368.08 and 2,385

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Solution

The fourth proportional to 7,578.72, 11,368.08 and 2,385 is: 3,577.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,578.72 : 11,368.08 = 2,385 : x
  2. Step 2: Convert to fraction form
    7,578.72/11,368.08 = 2,385/x
  3. Step 3: Cross multiply
    7,578.72x = 11,368.08 × 2,385
  4. Step 4: Simplify right side
    7,578.72x = 27,112,870.80
  5. Step 5: Solve for x
    x = 27,112,870.80/7,578.72
  6. Step 6: Final answer
    x = 3,577.50

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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.