Home / 21,248.60-31,811.32-18,997.36

Finding the Fourth Proportional to 21,248.60, 31,811.32 and 18,997.36

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Solution

The fourth proportional to 21,248.60, 31,811.32 and 18,997.36 is: 28,440.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,248.60 : 31,811.32 = 18,997.36 : x
  2. Step 2: Convert to fraction form
    21,248.60/31,811.32 = 18,997.36/x
  3. Step 3: Cross multiply
    21,248.60x = 31,811.32 × 18,997.36
  4. Step 4: Simplify right side
    21,248.60x = 604,331,098.12
  5. Step 5: Solve for x
    x = 604,331,098.12/21,248.60
  6. Step 6: Final answer
    x = 28,440.98

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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.