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Finding the Fourth Proportional to 15,145.86, 20,903.80 and 8,857.02

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Solution

The fourth proportional to 15,145.86, 20,903.80 and 8,857.02 is: 12,224.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,145.86 : 20,903.80 = 8,857.02 : x
  2. Step 2: Convert to fraction form
    15,145.86/20,903.80 = 8,857.02/x
  3. Step 3: Cross multiply
    15,145.86x = 20,903.80 × 8,857.02
  4. Step 4: Simplify right side
    15,145.86x = 185,145,374.68
  5. Step 5: Solve for x
    x = 185,145,374.68/15,145.86
  6. Step 6: Final answer
    x = 12,224.16

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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.