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Finding the Fourth Proportional to 18,460.81, 27,691.20 and 5,313.16

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Solution

The fourth proportional to 18,460.81, 27,691.20 and 5,313.16 is: 7,969.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,460.81 : 27,691.20 = 5,313.16 : x
  2. Step 2: Convert to fraction form
    18,460.81/27,691.20 = 5,313.16/x
  3. Step 3: Cross multiply
    18,460.81x = 27,691.20 × 5,313.16
  4. Step 4: Simplify right side
    18,460.81x = 147,127,810.81
  5. Step 5: Solve for x
    x = 147,127,810.81/18,460.81
  6. Step 6: Final answer
    x = 7,969.74

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.