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Finding the Fourth Proportional to 21,019.60, 29,025.80 and 20,023.76

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Solution

The fourth proportional to 21,019.60, 29,025.80 and 20,023.76 is: 27,650.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,019.60 : 29,025.80 = 20,023.76 : x
  2. Step 2: Convert to fraction form
    21,019.60/29,025.80 = 20,023.76/x
  3. Step 3: Cross multiply
    21,019.60x = 29,025.80 × 20,023.76
  4. Step 4: Simplify right side
    21,019.60x = 581,205,653.01
  5. Step 5: Solve for x
    x = 581,205,653.01/21,019.60
  6. Step 6: Final answer
    x = 27,650.65

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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.