Home / 15,855.78-21,885.48-9,568.56

Finding the Fourth Proportional to 15,855.78, 21,885.48 and 9,568.56

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Solution

The fourth proportional to 15,855.78, 21,885.48 and 9,568.56 is: 13,207.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,855.78 : 21,885.48 = 9,568.56 : x
  2. Step 2: Convert to fraction form
    15,855.78/21,885.48 = 9,568.56/x
  3. Step 3: Cross multiply
    15,855.78x = 21,885.48 × 9,568.56
  4. Step 4: Simplify right side
    15,855.78x = 209,412,528.51
  5. Step 5: Solve for x
    x = 209,412,528.51/15,855.78
  6. Step 6: Final answer
    x = 13,207.33

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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.