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Finding the Fourth Proportional to 18,378.70, 27,551.95 and 6,530.63

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Solution

The fourth proportional to 18,378.70, 27,551.95 and 6,530.63 is: 9,790.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,378.70 : 27,551.95 = 6,530.63 : x
  2. Step 2: Convert to fraction form
    18,378.70/27,551.95 = 6,530.63/x
  3. Step 3: Cross multiply
    18,378.70x = 27,551.95 × 6,530.63
  4. Step 4: Simplify right side
    18,378.70x = 179,931,437.14
  5. Step 5: Solve for x
    x = 179,931,437.14/18,378.70
  6. Step 6: Final answer
    x = 9,790.22

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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.