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Finding the Fourth Proportional to 8,858.64, 12,213.57 and 7,259.40

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Solution

The fourth proportional to 8,858.64, 12,213.57 and 7,259.40 is: 10,008.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,858.64 : 12,213.57 = 7,259.40 : x
  2. Step 2: Convert to fraction form
    8,858.64/12,213.57 = 7,259.40/x
  3. Step 3: Cross multiply
    8,858.64x = 12,213.57 × 7,259.40
  4. Step 4: Simplify right side
    8,858.64x = 88,663,190.06
  5. Step 5: Solve for x
    x = 88,663,190.06/8,858.64
  6. Step 6: Final answer
    x = 10,008.67

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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.