Home / 12,921.40-19,338.90-11,366.20

Finding the Fourth Proportional to 12,921.40, 19,338.90 and 11,366.20

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Solution

The fourth proportional to 12,921.40, 19,338.90 and 11,366.20 is: 17,011.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,921.40 : 19,338.90 = 11,366.20 : x
  2. Step 2: Convert to fraction form
    12,921.40/19,338.90 = 11,366.20/x
  3. Step 3: Cross multiply
    12,921.40x = 19,338.90 × 11,366.20
  4. Step 4: Simplify right side
    12,921.40x = 219,809,805.18
  5. Step 5: Solve for x
    x = 219,809,805.18/12,921.40
  6. Step 6: Final answer
    x = 17,011.30

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.