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Finding the Fourth Proportional to 8,715.21, 13,072.46 and 7,541.40

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Solution

The fourth proportional to 8,715.21, 13,072.46 and 7,541.40 is: 11,311.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,715.21 : 13,072.46 = 7,541.40 : x
  2. Step 2: Convert to fraction form
    8,715.21/13,072.46 = 7,541.40/x
  3. Step 3: Cross multiply
    8,715.21x = 13,072.46 × 7,541.40
  4. Step 4: Simplify right side
    8,715.21x = 98,584,652.36
  5. Step 5: Solve for x
    x = 98,584,652.36/8,715.21
  6. Step 6: Final answer
    x = 11,311.80

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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.