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Finding the Fourth Proportional to 15,170.81, 20,935.76 and 8,798.63

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Solution

The fourth proportional to 15,170.81, 20,935.76 and 8,798.63 is: 12,142.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,170.81 : 20,935.76 = 8,798.63 : x
  2. Step 2: Convert to fraction form
    15,170.81/20,935.76 = 8,798.63/x
  3. Step 3: Cross multiply
    15,170.81x = 20,935.76 × 8,798.63
  4. Step 4: Simplify right side
    15,170.81x = 184,205,857.34
  5. Step 5: Solve for x
    x = 184,205,857.34/15,170.81
  6. Step 6: Final answer
    x = 12,142.13

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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.