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Finding the Fourth Proportional to 18,903.97, 28,312.21 and 18,247.87

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Solution

The fourth proportional to 18,903.97, 28,312.21 and 18,247.87 is: 27,329.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,903.97 : 28,312.21 = 18,247.87 : x
  2. Step 2: Convert to fraction form
    18,903.97/28,312.21 = 18,247.87/x
  3. Step 3: Cross multiply
    18,903.97x = 28,312.21 × 18,247.87
  4. Step 4: Simplify right side
    18,903.97x = 516,637,527.49
  5. Step 5: Solve for x
    x = 516,637,527.49/18,903.97
  6. Step 6: Final answer
    x = 27,329.58

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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.