Home / 21,025.60-31,538.40-19,489.60

Finding the Fourth Proportional to 21,025.60, 31,538.40 and 19,489.60

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Solution

The fourth proportional to 21,025.60, 31,538.40 and 19,489.60 is: 29,234.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,025.60 : 31,538.40 = 19,489.60 : x
  2. Step 2: Convert to fraction form
    21,025.60/31,538.40 = 19,489.60/x
  3. Step 3: Cross multiply
    21,025.60x = 31,538.40 × 19,489.60
  4. Step 4: Simplify right side
    21,025.60x = 614,670,800.64
  5. Step 5: Solve for x
    x = 614,670,800.64/21,025.60
  6. Step 6: Final answer
    x = 29,234.40

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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.