Home / 21,030.71-31,591.87-12,714.64

Finding the Fourth Proportional to 21,030.71, 31,591.87 and 12,714.64

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Solution

The fourth proportional to 21,030.71, 31,591.87 and 12,714.64 is: 19,099.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.71 : 31,591.87 = 12,714.64 : x
  2. Step 2: Convert to fraction form
    21,030.71/31,591.87 = 12,714.64/x
  3. Step 3: Cross multiply
    21,030.71x = 31,591.87 × 12,714.64
  4. Step 4: Simplify right side
    21,030.71x = 401,679,143.21
  5. Step 5: Solve for x
    x = 401,679,143.21/21,030.71
  6. Step 6: Final answer
    x = 19,099.65

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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.