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Finding the Fourth Proportional to 13,710.24, 18,910.35 and 8,607.24

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Solution

The fourth proportional to 13,710.24, 18,910.35 and 8,607.24 is: 11,871.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,710.24 : 18,910.35 = 8,607.24 : x
  2. Step 2: Convert to fraction form
    13,710.24/18,910.35 = 8,607.24/x
  3. Step 3: Cross multiply
    13,710.24x = 18,910.35 × 8,607.24
  4. Step 4: Simplify right side
    13,710.24x = 162,765,920.93
  5. Step 5: Solve for x
    x = 162,765,920.93/13,710.24
  6. Step 6: Final answer
    x = 11,871.85

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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.