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Finding the Fourth Proportional to 18,275.19, 27,411.01 and 12,389.89

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Solution

The fourth proportional to 18,275.19, 27,411.01 and 12,389.89 is: 18,583.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,275.19 : 27,411.01 = 12,389.89 : x
  2. Step 2: Convert to fraction form
    18,275.19/27,411.01 = 12,389.89/x
  3. Step 3: Cross multiply
    18,275.19x = 27,411.01 × 12,389.89
  4. Step 4: Simplify right side
    18,275.19x = 339,619,273.49
  5. Step 5: Solve for x
    x = 339,619,273.49/18,275.19
  6. Step 6: Final answer
    x = 18,583.62

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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.