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Finding the Fourth Proportional to 18,861.66, 26,028.54 and 10,905.30

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Solution

The fourth proportional to 18,861.66, 26,028.54 and 10,905.30 is: 15,049.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,861.66 : 26,028.54 = 10,905.30 : x
  2. Step 2: Convert to fraction form
    18,861.66/26,028.54 = 10,905.30/x
  3. Step 3: Cross multiply
    18,861.66x = 26,028.54 × 10,905.30
  4. Step 4: Simplify right side
    18,861.66x = 283,849,037.26
  5. Step 5: Solve for x
    x = 283,849,037.26/18,861.66
  6. Step 6: Final answer
    x = 15,049.00

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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.