Home / 15,382.81-21,228.29-8,309.23

Finding the Fourth Proportional to 15,382.81, 21,228.29 and 8,309.23

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Solution

The fourth proportional to 15,382.81, 21,228.29 and 8,309.23 is: 11,466.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,382.81 : 21,228.29 = 8,309.23 : x
  2. Step 2: Convert to fraction form
    15,382.81/21,228.29 = 8,309.23/x
  3. Step 3: Cross multiply
    15,382.81x = 21,228.29 × 8,309.23
  4. Step 4: Simplify right side
    15,382.81x = 176,390,836.99
  5. Step 5: Solve for x
    x = 176,390,836.99/15,382.81
  6. Step 6: Final answer
    x = 11,466.75

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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.