Home / 13,721.87-18,937.59-9,896.69

Finding the Fourth Proportional to 13,721.87, 18,937.59 and 9,896.69

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Solution

The fourth proportional to 13,721.87, 18,937.59 and 9,896.69 is: 13,658.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,721.87 : 18,937.59 = 9,896.69 : x
  2. Step 2: Convert to fraction form
    13,721.87/18,937.59 = 9,896.69/x
  3. Step 3: Cross multiply
    13,721.87x = 18,937.59 × 9,896.69
  4. Step 4: Simplify right side
    13,721.87x = 187,419,457.58
  5. Step 5: Solve for x
    x = 187,419,457.58/13,721.87
  6. Step 6: Final answer
    x = 13,658.45

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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.