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Finding the Fourth Proportional to 15,098.95, 20,836.74 and 8,385.00

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Solution

The fourth proportional to 15,098.95, 20,836.74 and 8,385.00 is: 11,571.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,098.95 : 20,836.74 = 8,385.00 : x
  2. Step 2: Convert to fraction form
    15,098.95/20,836.74 = 8,385.00/x
  3. Step 3: Cross multiply
    15,098.95x = 20,836.74 × 8,385.00
  4. Step 4: Simplify right side
    15,098.95x = 174,715,960.72
  5. Step 5: Solve for x
    x = 174,715,960.72/15,098.95
  6. Step 6: Final answer
    x = 11,571.40

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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.