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Finding the Fourth Proportional to 28,807, 43,112.90 and 17,720.70

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Solution

The fourth proportional to 28,807, 43,112.90 and 17,720.70 is: 26,521.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,807 : 43,112.90 = 17,720.70 : x
  2. Step 2: Convert to fraction form
    28,807/43,112.90 = 17,720.70/x
  3. Step 3: Cross multiply
    28,807x = 43,112.90 × 17,720.70
  4. Step 4: Simplify right side
    28,807x = 763,990,767.03
  5. Step 5: Solve for x
    x = 763,990,767.03/28,807
  6. Step 6: Final answer
    x = 26,521.01

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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.