Home / 21,219.62-31,813.70-10,681.92

Finding the Fourth Proportional to 21,219.62, 31,813.70 and 10,681.92

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Solution

The fourth proportional to 21,219.62, 31,813.70 and 10,681.92 is: 16,014.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,219.62 : 31,813.70 = 10,681.92 : x
  2. Step 2: Convert to fraction form
    21,219.62/31,813.70 = 10,681.92/x
  3. Step 3: Cross multiply
    21,219.62x = 31,813.70 × 10,681.92
  4. Step 4: Simplify right side
    21,219.62x = 339,831,344.89
  5. Step 5: Solve for x
    x = 339,831,344.89/21,219.62
  6. Step 6: Final answer
    x = 16,014.96

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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.