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Finding the Fourth Proportional to 28,665.87, 43,008.04 and 12,021.44

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Solution

The fourth proportional to 28,665.87, 43,008.04 and 12,021.44 is: 18,036.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,665.87 : 43,008.04 = 12,021.44 : x
  2. Step 2: Convert to fraction form
    28,665.87/43,008.04 = 12,021.44/x
  3. Step 3: Cross multiply
    28,665.87x = 43,008.04 × 12,021.44
  4. Step 4: Simplify right side
    28,665.87x = 517,018,459.51
  5. Step 5: Solve for x
    x = 517,018,459.51/28,665.87
  6. Step 6: Final answer
    x = 18,036.03

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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.