Home / 13,722.50-18,939.80-7,754.24

Finding the Fourth Proportional to 13,722.50, 18,939.80 and 7,754.24

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Solution

The fourth proportional to 13,722.50, 18,939.80 and 7,754.24 is: 10,702.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,722.50 : 18,939.80 = 7,754.24 : x
  2. Step 2: Convert to fraction form
    13,722.50/18,939.80 = 7,754.24/x
  3. Step 3: Cross multiply
    13,722.50x = 18,939.80 × 7,754.24
  4. Step 4: Simplify right side
    13,722.50x = 146,863,715.98
  5. Step 5: Solve for x
    x = 146,863,715.98/13,722.50
  6. Step 6: Final answer
    x = 10,702.40

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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.