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Finding the Fourth Proportional to 14,483.28, 21,740.28 and 12,828.15

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Solution

The fourth proportional to 14,483.28, 21,740.28 and 12,828.15 is: 19,255.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,483.28 : 21,740.28 = 12,828.15 : x
  2. Step 2: Convert to fraction form
    14,483.28/21,740.28 = 12,828.15/x
  3. Step 3: Cross multiply
    14,483.28x = 21,740.28 × 12,828.15
  4. Step 4: Simplify right side
    14,483.28x = 278,887,572.88
  5. Step 5: Solve for x
    x = 278,887,572.88/14,483.28
  6. Step 6: Final answer
    x = 19,255.83

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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.