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Finding the Fourth Proportional to 18,368.31, 27,551.82 and 7,980.06

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Solution

The fourth proportional to 18,368.31, 27,551.82 and 7,980.06 is: 11,969.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,368.31 : 27,551.82 = 7,980.06 : x
  2. Step 2: Convert to fraction form
    18,368.31/27,551.82 = 7,980.06/x
  3. Step 3: Cross multiply
    18,368.31x = 27,551.82 × 7,980.06
  4. Step 4: Simplify right side
    18,368.31x = 219,865,176.71
  5. Step 5: Solve for x
    x = 219,865,176.71/18,368.31
  6. Step 6: Final answer
    x = 11,969.81

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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.