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Finding the Fourth Proportional to 18,472.79, 27,709.18 and 4,621.79

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Solution

The fourth proportional to 18,472.79, 27,709.18 and 4,621.79 is: 6,932.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,472.79 : 27,709.18 = 4,621.79 : x
  2. Step 2: Convert to fraction form
    18,472.79/27,709.18 = 4,621.79/x
  3. Step 3: Cross multiply
    18,472.79x = 27,709.18 × 4,621.79
  4. Step 4: Simplify right side
    18,472.79x = 128,066,068.75
  5. Step 5: Solve for x
    x = 128,066,068.75/18,472.79
  6. Step 6: Final answer
    x = 6,932.69

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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.