Home / 9,908.84-13,686.18-7,840.36

Finding the Fourth Proportional to 9,908.84, 13,686.18 and 7,840.36

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Solution

The fourth proportional to 9,908.84, 13,686.18 and 7,840.36 is: 10,829.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,908.84 : 13,686.18 = 7,840.36 : x
  2. Step 2: Convert to fraction form
    9,908.84/13,686.18 = 7,840.36/x
  3. Step 3: Cross multiply
    9,908.84x = 13,686.18 × 7,840.36
  4. Step 4: Simplify right side
    9,908.84x = 107,304,578.22
  5. Step 5: Solve for x
    x = 107,304,578.22/9,908.84
  6. Step 6: Final answer
    x = 10,829.18

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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.