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Finding the Fourth Proportional to 18,927.27, 28,390.95 and 18,899.91

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Solution

The fourth proportional to 18,927.27, 28,390.95 and 18,899.91 is: 28,349.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,927.27 : 28,390.95 = 18,899.91 : x
  2. Step 2: Convert to fraction form
    18,927.27/28,390.95 = 18,899.91/x
  3. Step 3: Cross multiply
    18,927.27x = 28,390.95 × 18,899.91
  4. Step 4: Simplify right side
    18,927.27x = 536,586,399.81
  5. Step 5: Solve for x
    x = 536,586,399.81/18,927.27
  6. Step 6: Final answer
    x = 28,349.91

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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.