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Finding the Fourth Proportional to 6,624.18, 9,130.39 and 6,448.89

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Solution

The fourth proportional to 6,624.18, 9,130.39 and 6,448.89 is: 8,888.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,624.18 : 9,130.39 = 6,448.89 : x
  2. Step 2: Convert to fraction form
    6,624.18/9,130.39 = 6,448.89/x
  3. Step 3: Cross multiply
    6,624.18x = 9,130.39 × 6,448.89
  4. Step 4: Simplify right side
    6,624.18x = 58,880,847.53
  5. Step 5: Solve for x
    x = 58,880,847.53/6,624.18
  6. Step 6: Final answer
    x = 8,888.78

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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.