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Finding the Fourth Proportional to 28,004.40, 42,006.60 and 21,662.10

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Solution

The fourth proportional to 28,004.40, 42,006.60 and 21,662.10 is: 32,493.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,004.40 : 42,006.60 = 21,662.10 : x
  2. Step 2: Convert to fraction form
    28,004.40/42,006.60 = 21,662.10/x
  3. Step 3: Cross multiply
    28,004.40x = 42,006.60 × 21,662.10
  4. Step 4: Simplify right side
    28,004.40x = 909,951,169.86
  5. Step 5: Solve for x
    x = 909,951,169.86/28,004.40
  6. Step 6: Final answer
    x = 32,493.15

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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.