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Finding the Fourth Proportional to 8,807.70, 13,222.35 and 8,742.90

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Solution

The fourth proportional to 8,807.70, 13,222.35 and 8,742.90 is: 13,125.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,807.70 : 13,222.35 = 8,742.90 : x
  2. Step 2: Convert to fraction form
    8,807.70/13,222.35 = 8,742.90/x
  3. Step 3: Cross multiply
    8,807.70x = 13,222.35 × 8,742.90
  4. Step 4: Simplify right side
    8,807.70x = 115,601,683.82
  5. Step 5: Solve for x
    x = 115,601,683.82/8,807.70
  6. Step 6: Final answer
    x = 13,125.07

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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.