Home / 15,435.78-21,297.69-9,147.06

Finding the Fourth Proportional to 15,435.78, 21,297.69 and 9,147.06

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Solution

The fourth proportional to 15,435.78, 21,297.69 and 9,147.06 is: 12,620.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,435.78 : 21,297.69 = 9,147.06 : x
  2. Step 2: Convert to fraction form
    15,435.78/21,297.69 = 9,147.06/x
  3. Step 3: Cross multiply
    15,435.78x = 21,297.69 × 9,147.06
  4. Step 4: Simplify right side
    15,435.78x = 194,811,248.29
  5. Step 5: Solve for x
    x = 194,811,248.29/15,435.78
  6. Step 6: Final answer
    x = 12,620.76

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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.