Home / 13,721.58-18,935.70-7,755.18

Finding the Fourth Proportional to 13,721.58, 18,935.70 and 7,755.18

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Solution

The fourth proportional to 13,721.58, 18,935.70 and 7,755.18 is: 10,702.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.58 : 18,935.70 = 7,755.18 : x
  2. Step 2: Convert to fraction form
    13,721.58/18,935.70 = 7,755.18/x
  3. Step 3: Cross multiply
    13,721.58x = 18,935.70 × 7,755.18
  4. Step 4: Simplify right side
    13,721.58x = 146,849,761.93
  5. Step 5: Solve for x
    x = 146,849,761.93/13,721.58
  6. Step 6: Final answer
    x = 10,702.10

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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.