Home / 21,030.46-31,591.48-12,714.40

Finding the Fourth Proportional to 21,030.46, 31,591.48 and 12,714.40

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Solution

The fourth proportional to 21,030.46, 31,591.48 and 12,714.40 is: 19,099.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,030.46 : 31,591.48 = 12,714.40 : x
  2. Step 2: Convert to fraction form
    21,030.46/31,591.48 = 12,714.40/x
  3. Step 3: Cross multiply
    21,030.46x = 31,591.48 × 12,714.40
  4. Step 4: Simplify right side
    21,030.46x = 401,666,713.31
  5. Step 5: Solve for x
    x = 401,666,713.31/21,030.46
  6. Step 6: Final answer
    x = 19,099.28

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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.