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Finding the Fourth Proportional to 18,973.83, 28,462.11 and 7,287.05

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Solution

The fourth proportional to 18,973.83, 28,462.11 and 7,287.05 is: 10,931.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,973.83 : 28,462.11 = 7,287.05 : x
  2. Step 2: Convert to fraction form
    18,973.83/28,462.11 = 7,287.05/x
  3. Step 3: Cross multiply
    18,973.83x = 28,462.11 × 7,287.05
  4. Step 4: Simplify right side
    18,973.83x = 207,404,722.90
  5. Step 5: Solve for x
    x = 207,404,722.90/18,973.83
  6. Step 6: Final answer
    x = 10,931.10

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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.