Home / 21,939.46-30,274.40-13,437.70

Finding the Fourth Proportional to 21,939.46, 30,274.40 and 13,437.70

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Solution

The fourth proportional to 21,939.46, 30,274.40 and 13,437.70 is: 18,542.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,939.46 : 30,274.40 = 13,437.70 : x
  2. Step 2: Convert to fraction form
    21,939.46/30,274.40 = 13,437.70/x
  3. Step 3: Cross multiply
    21,939.46x = 30,274.40 × 13,437.70
  4. Step 4: Simplify right side
    21,939.46x = 406,818,304.88
  5. Step 5: Solve for x
    x = 406,818,304.88/21,939.46
  6. Step 6: Final answer
    x = 18,542.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.