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Finding the Fourth Proportional to 8,901.21, 12,256.47 and 7,775.58

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Solution

The fourth proportional to 8,901.21, 12,256.47 and 7,775.58 is: 10,706.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,901.21 : 12,256.47 = 7,775.58 : x
  2. Step 2: Convert to fraction form
    8,901.21/12,256.47 = 7,775.58/x
  3. Step 3: Cross multiply
    8,901.21x = 12,256.47 × 7,775.58
  4. Step 4: Simplify right side
    8,901.21x = 95,301,163.00
  5. Step 5: Solve for x
    x = 95,301,163.00/8,901.21
  6. Step 6: Final answer
    x = 10,706.54

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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.