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Finding the Fourth Proportional to 15,102.99, 20,844.68 and 8,390.84

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Solution

The fourth proportional to 15,102.99, 20,844.68 and 8,390.84 is: 11,580.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,102.99 : 20,844.68 = 8,390.84 : x
  2. Step 2: Convert to fraction form
    15,102.99/20,844.68 = 8,390.84/x
  3. Step 3: Cross multiply
    15,102.99x = 20,844.68 × 8,390.84
  4. Step 4: Simplify right side
    15,102.99x = 174,904,228.55
  5. Step 5: Solve for x
    x = 174,904,228.55/15,102.99
  6. Step 6: Final answer
    x = 11,580.77

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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.