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Finding the Fourth Proportional to 7,612.90, 11,419.35 and 3,724.90

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Solution

The fourth proportional to 7,612.90, 11,419.35 and 3,724.90 is: 5,587.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,612.90 : 11,419.35 = 3,724.90 : x
  2. Step 2: Convert to fraction form
    7,612.90/11,419.35 = 3,724.90/x
  3. Step 3: Cross multiply
    7,612.90x = 11,419.35 × 3,724.90
  4. Step 4: Simplify right side
    7,612.90x = 42,535,936.82
  5. Step 5: Solve for x
    x = 42,535,936.82/7,612.90
  6. Step 6: Final answer
    x = 5,587.35

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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.