Home / 21,011.26-31,520.63-6,972.13

Finding the Fourth Proportional to 21,011.26, 31,520.63 and 6,972.13

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Solution

The fourth proportional to 21,011.26, 31,520.63 and 6,972.13 is: 10,459.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,011.26 : 31,520.63 = 6,972.13 : x
  2. Step 2: Convert to fraction form
    21,011.26/31,520.63 = 6,972.13/x
  3. Step 3: Cross multiply
    21,011.26x = 31,520.63 × 6,972.13
  4. Step 4: Simplify right side
    21,011.26x = 219,765,930.04
  5. Step 5: Solve for x
    x = 219,765,930.04/21,011.26
  6. Step 6: Final answer
    x = 10,459.44

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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.