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Finding the Fourth Proportional to 18,985.14, 28,480.14 and 7,296.84

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Solution

The fourth proportional to 18,985.14, 28,480.14 and 7,296.84 is: 10,946.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,985.14 : 28,480.14 = 7,296.84 : x
  2. Step 2: Convert to fraction form
    18,985.14/28,480.14 = 7,296.84/x
  3. Step 3: Cross multiply
    18,985.14x = 28,480.14 × 7,296.84
  4. Step 4: Simplify right side
    18,985.14x = 207,815,024.76
  5. Step 5: Solve for x
    x = 207,815,024.76/18,985.14
  6. Step 6: Final answer
    x = 10,946.19

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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.