Home / 21,031.21-31,592.62-12,715.14

Finding the Fourth Proportional to 21,031.21, 31,592.62 and 12,715.14

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Solution

The fourth proportional to 21,031.21, 31,592.62 and 12,715.14 is: 19,100.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,031.21 : 31,592.62 = 12,715.14 : x
  2. Step 2: Convert to fraction form
    21,031.21/31,592.62 = 12,715.14/x
  3. Step 3: Cross multiply
    21,031.21x = 31,592.62 × 12,715.14
  4. Step 4: Simplify right side
    21,031.21x = 401,704,586.27
  5. Step 5: Solve for x
    x = 401,704,586.27/21,031.21
  6. Step 6: Final answer
    x = 19,100.41

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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.