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Finding the Fourth Proportional to 19,294.84, 28,990.71 and 12,277.91

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Solution

The fourth proportional to 19,294.84, 28,990.71 and 12,277.91 is: 18,447.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,294.84 : 28,990.71 = 12,277.91 : x
  2. Step 2: Convert to fraction form
    19,294.84/28,990.71 = 12,277.91/x
  3. Step 3: Cross multiply
    19,294.84x = 28,990.71 × 12,277.91
  4. Step 4: Simplify right side
    19,294.84x = 355,945,400.69
  5. Step 5: Solve for x
    x = 355,945,400.69/19,294.84
  6. Step 6: Final answer
    x = 18,447.70

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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.