Home / 18,681.17-25,778.45-10,721.70

Finding the Fourth Proportional to 18,681.17, 25,778.45 and 10,721.70

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Solution

The fourth proportional to 18,681.17, 25,778.45 and 10,721.70 is: 14,795.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,681.17 : 25,778.45 = 10,721.70 : x
  2. Step 2: Convert to fraction form
    18,681.17/25,778.45 = 10,721.70/x
  3. Step 3: Cross multiply
    18,681.17x = 25,778.45 × 10,721.70
  4. Step 4: Simplify right side
    18,681.17x = 276,388,834.17
  5. Step 5: Solve for x
    x = 276,388,834.17/18,681.17
  6. Step 6: Final answer
    x = 14,795.05

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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.