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Finding the Fourth Proportional to 15,099.15, 20,835.30 and 8,815.17

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Solution

The fourth proportional to 15,099.15, 20,835.30 and 8,815.17 is: 12,164.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,099.15 : 20,835.30 = 8,815.17 : x
  2. Step 2: Convert to fraction form
    15,099.15/20,835.30 = 8,815.17/x
  3. Step 3: Cross multiply
    15,099.15x = 20,835.30 × 8,815.17
  4. Step 4: Simplify right side
    15,099.15x = 183,666,822.69
  5. Step 5: Solve for x
    x = 183,666,822.69/15,099.15
  6. Step 6: Final answer
    x = 12,164.05

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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.