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Finding the Fourth Proportional to 19,363.20, 28,972.80 and 14,179.20

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Solution

The fourth proportional to 19,363.20, 28,972.80 and 14,179.20 is: 21,216.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,363.20 : 28,972.80 = 14,179.20 : x
  2. Step 2: Convert to fraction form
    19,363.20/28,972.80 = 14,179.20/x
  3. Step 3: Cross multiply
    19,363.20x = 28,972.80 × 14,179.20
  4. Step 4: Simplify right side
    19,363.20x = 410,811,125.76
  5. Step 5: Solve for x
    x = 410,811,125.76/19,363.20
  6. Step 6: Final answer
    x = 21,216.08

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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.