Home / 15,303.81-21,121.32-8,589.81

Finding the Fourth Proportional to 15,303.81, 21,121.32 and 8,589.81

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Solution

The fourth proportional to 15,303.81, 21,121.32 and 8,589.81 is: 11,855.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,303.81 : 21,121.32 = 8,589.81 : x
  2. Step 2: Convert to fraction form
    15,303.81/21,121.32 = 8,589.81/x
  3. Step 3: Cross multiply
    15,303.81x = 21,121.32 × 8,589.81
  4. Step 4: Simplify right side
    15,303.81x = 181,428,046.54
  5. Step 5: Solve for x
    x = 181,428,046.54/15,303.81
  6. Step 6: Final answer
    x = 11,855.09

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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.