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Finding the Fourth Proportional to 19,218.70, 28,828.05 and 8,830.45

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Solution

The fourth proportional to 19,218.70, 28,828.05 and 8,830.45 is: 13,245.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,218.70 : 28,828.05 = 8,830.45 : x
  2. Step 2: Convert to fraction form
    19,218.70/28,828.05 = 8,830.45/x
  3. Step 3: Cross multiply
    19,218.70x = 28,828.05 × 8,830.45
  4. Step 4: Simplify right side
    19,218.70x = 254,564,654.12
  5. Step 5: Solve for x
    x = 254,564,654.12/19,218.70
  6. Step 6: Final answer
    x = 13,245.68

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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.