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Finding the Fourth Proportional to 8,307.54, 11,457.18 and 7,188.12

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Solution

The fourth proportional to 8,307.54, 11,457.18 and 7,188.12 is: 9,913.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,307.54 : 11,457.18 = 7,188.12 : x
  2. Step 2: Convert to fraction form
    8,307.54/11,457.18 = 7,188.12/x
  3. Step 3: Cross multiply
    8,307.54x = 11,457.18 × 7,188.12
  4. Step 4: Simplify right side
    8,307.54x = 82,355,584.70
  5. Step 5: Solve for x
    x = 82,355,584.70/8,307.54
  6. Step 6: Final answer
    x = 9,913.35

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Double scale
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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.