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Finding the Fourth Proportional to 12,555.80, 17,312.78 and 8,579.16

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Solution

The fourth proportional to 12,555.80, 17,312.78 and 8,579.16 is: 11,829.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,555.80 : 17,312.78 = 8,579.16 : x
  2. Step 2: Convert to fraction form
    12,555.80/17,312.78 = 8,579.16/x
  3. Step 3: Cross multiply
    12,555.80x = 17,312.78 × 8,579.16
  4. Step 4: Simplify right side
    12,555.80x = 148,529,109.66
  5. Step 5: Solve for x
    x = 148,529,109.66/12,555.80
  6. Step 6: Final answer
    x = 11,829.52

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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.