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Finding the Fourth Proportional to 19,254.30, 28,859.85 and 9,890.70

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Solution

The fourth proportional to 19,254.30, 28,859.85 and 9,890.70 is: 14,824.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,254.30 : 28,859.85 = 9,890.70 : x
  2. Step 2: Convert to fraction form
    19,254.30/28,859.85 = 9,890.70/x
  3. Step 3: Cross multiply
    19,254.30x = 28,859.85 × 9,890.70
  4. Step 4: Simplify right side
    19,254.30x = 285,444,118.40
  5. Step 5: Solve for x
    x = 285,444,118.40/19,254.30
  6. Step 6: Final answer
    x = 14,824.95

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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.