Home / 13,711.78-18,922.62-7,743.58

Finding the Fourth Proportional to 13,711.78, 18,922.62 and 7,743.58

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Solution

The fourth proportional to 13,711.78, 18,922.62 and 7,743.58 is: 10,686.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,711.78 : 18,922.62 = 7,743.58 : x
  2. Step 2: Convert to fraction form
    13,711.78/18,922.62 = 7,743.58/x
  3. Step 3: Cross multiply
    13,711.78x = 18,922.62 × 7,743.58
  4. Step 4: Simplify right side
    13,711.78x = 146,528,821.78
  5. Step 5: Solve for x
    x = 146,528,821.78/13,711.78
  6. Step 6: Final answer
    x = 10,686.35

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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.