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Finding the Fourth Proportional to 18,730.65, 28,095.87 and 7,637.30

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Solution

The fourth proportional to 18,730.65, 28,095.87 and 7,637.30 is: 11,455.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,730.65 : 28,095.87 = 7,637.30 : x
  2. Step 2: Convert to fraction form
    18,730.65/28,095.87 = 7,637.30/x
  3. Step 3: Cross multiply
    18,730.65x = 28,095.87 × 7,637.30
  4. Step 4: Simplify right side
    18,730.65x = 214,576,447.47
  5. Step 5: Solve for x
    x = 214,576,447.47/18,730.65
  6. Step 6: Final answer
    x = 11,455.90

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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.