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Finding the Fourth Proportional to 18,710.68, 28,069.72 and 6,864.56

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Solution

The fourth proportional to 18,710.68, 28,069.72 and 6,864.56 is: 10,298.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,710.68 : 28,069.72 = 6,864.56 : x
  2. Step 2: Convert to fraction form
    18,710.68/28,069.72 = 6,864.56/x
  3. Step 3: Cross multiply
    18,710.68x = 28,069.72 × 6,864.56
  4. Step 4: Simplify right side
    18,710.68x = 192,686,330.14
  5. Step 5: Solve for x
    x = 192,686,330.14/18,710.68
  6. Step 6: Final answer
    x = 10,298.20

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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.