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Finding the Fourth Proportional to 22,750.05, 31,500.05 and 21,000.45

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Solution

The fourth proportional to 22,750.05, 31,500.05 and 21,000.45 is: 29,077.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    22,750.05 : 31,500.05 = 21,000.45 : x
  2. Step 2: Convert to fraction form
    22,750.05/31,500.05 = 21,000.45/x
  3. Step 3: Cross multiply
    22,750.05x = 31,500.05 × 21,000.45
  4. Step 4: Simplify right side
    22,750.05x = 661,515,120.02
  5. Step 5: Solve for x
    x = 661,515,120.02/22,750.05
  6. Step 6: Final answer
    x = 29,077.52

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.