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Finding the Fourth Proportional to 7,398.90, 11,098.35 and 4,920.30

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Solution

The fourth proportional to 7,398.90, 11,098.35 and 4,920.30 is: 7,380.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,398.90 : 11,098.35 = 4,920.30 : x
  2. Step 2: Convert to fraction form
    7,398.90/11,098.35 = 4,920.30/x
  3. Step 3: Cross multiply
    7,398.90x = 11,098.35 × 4,920.30
  4. Step 4: Simplify right side
    7,398.90x = 54,607,211.51
  5. Step 5: Solve for x
    x = 54,607,211.51/7,398.90
  6. Step 6: Final answer
    x = 7,380.45

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Half scale
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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.