Home / 13,938.91-20,896.04-10,666.61

Finding the Fourth Proportional to 13,938.91, 20,896.04 and 10,666.61

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Solution

The fourth proportional to 13,938.91, 20,896.04 and 10,666.61 is: 15,990.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,938.91 : 20,896.04 = 10,666.61 : x
  2. Step 2: Convert to fraction form
    13,938.91/20,896.04 = 10,666.61/x
  3. Step 3: Cross multiply
    13,938.91x = 20,896.04 × 10,666.61
  4. Step 4: Simplify right side
    13,938.91x = 222,889,909.77
  5. Step 5: Solve for x
    x = 222,889,909.77/13,938.91
  6. Step 6: Final answer
    x = 15,990.49

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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.