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Finding the Fourth Proportional to 8,789, 12,128.24 and 5,252.26

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Solution

The fourth proportional to 8,789, 12,128.24 and 5,252.26 is: 7,247.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,789 : 12,128.24 = 5,252.26 : x
  2. Step 2: Convert to fraction form
    8,789/12,128.24 = 5,252.26/x
  3. Step 3: Cross multiply
    8,789x = 12,128.24 × 5,252.26
  4. Step 4: Simplify right side
    8,789x = 63,700,669.82
  5. Step 5: Solve for x
    x = 63,700,669.82/8,789
  6. Step 6: Final answer
    x = 7,247.77

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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.