Home / 21,207.28-31,814.59-7,167.42

Finding the Fourth Proportional to 21,207.28, 31,814.59 and 7,167.42

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Solution

The fourth proportional to 21,207.28, 31,814.59 and 7,167.42 is: 10,752.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,207.28 : 31,814.59 = 7,167.42 : x
  2. Step 2: Convert to fraction form
    21,207.28/31,814.59 = 7,167.42/x
  3. Step 3: Cross multiply
    21,207.28x = 31,814.59 × 7,167.42
  4. Step 4: Simplify right side
    21,207.28x = 228,028,528.66
  5. Step 5: Solve for x
    x = 228,028,528.66/21,207.28
  6. Step 6: Final answer
    x = 10,752.37

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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.