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Finding the Fourth Proportional to 28,762.68, 43,105.14 and 14,921.40

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Solution

The fourth proportional to 28,762.68, 43,105.14 and 14,921.40 is: 22,361.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,762.68 : 43,105.14 = 14,921.40 : x
  2. Step 2: Convert to fraction form
    28,762.68/43,105.14 = 14,921.40/x
  3. Step 3: Cross multiply
    28,762.68x = 43,105.14 × 14,921.40
  4. Step 4: Simplify right side
    28,762.68x = 643,189,036.00
  5. Step 5: Solve for x
    x = 643,189,036.00/28,762.68
  6. Step 6: Final answer
    x = 22,361.93

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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.