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Finding the Fourth Proportional to 18,289.68, 27,368.88 and 15,359.08

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Solution

The fourth proportional to 18,289.68, 27,368.88 and 15,359.08 is: 22,983.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,289.68 : 27,368.88 = 15,359.08 : x
  2. Step 2: Convert to fraction form
    18,289.68/27,368.88 = 15,359.08/x
  3. Step 3: Cross multiply
    18,289.68x = 27,368.88 × 15,359.08
  4. Step 4: Simplify right side
    18,289.68x = 420,360,817.43
  5. Step 5: Solve for x
    x = 420,360,817.43/18,289.68
  6. Step 6: Final answer
    x = 22,983.50

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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.