Home / 13,721.80-18,937.19-7,754.70

Finding the Fourth Proportional to 13,721.80, 18,937.19 and 7,754.70

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Solution

The fourth proportional to 13,721.80, 18,937.19 and 7,754.70 is: 10,702.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.80 : 18,937.19 = 7,754.70 : x
  2. Step 2: Convert to fraction form
    13,721.80/18,937.19 = 7,754.70/x
  3. Step 3: Cross multiply
    13,721.80x = 18,937.19 × 7,754.70
  4. Step 4: Simplify right side
    13,721.80x = 146,852,317.69
  5. Step 5: Solve for x
    x = 146,852,317.69/13,721.80
  6. Step 6: Final answer
    x = 10,702.12

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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.