Home / 15,121.50-20,812.59-13,317.14

Finding the Fourth Proportional to 15,121.50, 20,812.59 and 13,317.14

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Solution

The fourth proportional to 15,121.50, 20,812.59 and 13,317.14 is: 18,329.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,121.50 : 20,812.59 = 13,317.14 : x
  2. Step 2: Convert to fraction form
    15,121.50/20,812.59 = 13,317.14/x
  3. Step 3: Cross multiply
    15,121.50x = 20,812.59 × 13,317.14
  4. Step 4: Simplify right side
    15,121.50x = 277,164,070.73
  5. Step 5: Solve for x
    x = 277,164,070.73/15,121.50
  6. Step 6: Final answer
    x = 18,329.14

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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.