Home / 15,377.24-21,166.35-11,121.40

Finding the Fourth Proportional to 15,377.24, 21,166.35 and 11,121.40

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Solution

The fourth proportional to 15,377.24, 21,166.35 and 11,121.40 is: 15,308.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,377.24 : 21,166.35 = 11,121.40 : x
  2. Step 2: Convert to fraction form
    15,377.24/21,166.35 = 11,121.40/x
  3. Step 3: Cross multiply
    15,377.24x = 21,166.35 × 11,121.40
  4. Step 4: Simplify right side
    15,377.24x = 235,399,429.64
  5. Step 5: Solve for x
    x = 235,399,429.64/15,377.24
  6. Step 6: Final answer
    x = 15,308.30

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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.