Home / 21,071.88-31,604.40-7,031.34

Finding the Fourth Proportional to 21,071.88, 31,604.40 and 7,031.34

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Solution

The fourth proportional to 21,071.88, 31,604.40 and 7,031.34 is: 10,545.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,071.88 : 31,604.40 = 7,031.34 : x
  2. Step 2: Convert to fraction form
    21,071.88/31,604.40 = 7,031.34/x
  3. Step 3: Cross multiply
    21,071.88x = 31,604.40 × 7,031.34
  4. Step 4: Simplify right side
    21,071.88x = 222,221,281.90
  5. Step 5: Solve for x
    x = 222,221,281.90/21,071.88
  6. Step 6: Final answer
    x = 10,545.87

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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.