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Finding the Fourth Proportional to 18,982.01, 28,483.95 and 7,889.06

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Solution

The fourth proportional to 18,982.01, 28,483.95 and 7,889.06 is: 11,838.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,982.01 : 28,483.95 = 7,889.06 : x
  2. Step 2: Convert to fraction form
    18,982.01/28,483.95 = 7,889.06/x
  3. Step 3: Cross multiply
    18,982.01x = 28,483.95 × 7,889.06
  4. Step 4: Simplify right side
    18,982.01x = 224,711,590.59
  5. Step 5: Solve for x
    x = 224,711,590.59/18,982.01
  6. Step 6: Final answer
    x = 11,838.13

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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.