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Finding the Fourth Proportional to 8,880.78, 12,307.29 and 8,755.50

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Solution

The fourth proportional to 8,880.78, 12,307.29 and 8,755.50 is: 12,133.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,880.78 : 12,307.29 = 8,755.50 : x
  2. Step 2: Convert to fraction form
    8,880.78/12,307.29 = 8,755.50/x
  3. Step 3: Cross multiply
    8,880.78x = 12,307.29 × 8,755.50
  4. Step 4: Simplify right side
    8,880.78x = 107,756,477.60
  5. Step 5: Solve for x
    x = 107,756,477.60/8,880.78
  6. Step 6: Final answer
    x = 12,133.67

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Half scale
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Double scale
Find fourth proportional to 8,881.78, 12,308.68 and 8,756.50
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.