Home / 9,908.98-13,669.28-6,721.20

Finding the Fourth Proportional to 9,908.98, 13,669.28 and 6,721.20

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Solution

The fourth proportional to 9,908.98, 13,669.28 and 6,721.20 is: 9,271.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,908.98 : 13,669.28 = 6,721.20 : x
  2. Step 2: Convert to fraction form
    9,908.98/13,669.28 = 6,721.20/x
  3. Step 3: Cross multiply
    9,908.98x = 13,669.28 × 6,721.20
  4. Step 4: Simplify right side
    9,908.98x = 91,873,964.74
  5. Step 5: Solve for x
    x = 91,873,964.74/9,908.98
  6. Step 6: Final answer
    x = 9,271.79

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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.