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Finding the Fourth Proportional to 15,109.61, 20,852.61 and 8,396.60

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Solution

The fourth proportional to 15,109.61, 20,852.61 and 8,396.60 is: 11,588.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,109.61 : 20,852.61 = 8,396.60 : x
  2. Step 2: Convert to fraction form
    15,109.61/20,852.61 = 8,396.60/x
  3. Step 3: Cross multiply
    15,109.61x = 20,852.61 × 8,396.60
  4. Step 4: Simplify right side
    15,109.61x = 175,091,025.13
  5. Step 5: Solve for x
    x = 175,091,025.13/15,109.61
  6. Step 6: Final answer
    x = 11,588.06

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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.