Home / 21,056.40-31,540.73-9,971.96

Finding the Fourth Proportional to 21,056.40, 31,540.73 and 9,971.96

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Solution

The fourth proportional to 21,056.40, 31,540.73 and 9,971.96 is: 14,937.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,056.40 : 31,540.73 = 9,971.96 : x
  2. Step 2: Convert to fraction form
    21,056.40/31,540.73 = 9,971.96/x
  3. Step 3: Cross multiply
    21,056.40x = 31,540.73 × 9,971.96
  4. Step 4: Simplify right side
    21,056.40x = 314,522,690.37
  5. Step 5: Solve for x
    x = 314,522,690.37/21,056.40
  6. Step 6: Final answer
    x = 14,937.15

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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.