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Finding the Fourth Proportional to 12,699, 17,520.57 and 8,226.18

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Solution

The fourth proportional to 12,699, 17,520.57 and 8,226.18 is: 11,349.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,699 : 17,520.57 = 8,226.18 : x
  2. Step 2: Convert to fraction form
    12,699/17,520.57 = 8,226.18/x
  3. Step 3: Cross multiply
    12,699x = 17,520.57 × 8,226.18
  4. Step 4: Simplify right side
    12,699x = 144,127,362.52
  5. Step 5: Solve for x
    x = 144,127,362.52/12,699
  6. Step 6: Final answer
    x = 11,349.50

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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.