Home / 15,382.86-21,228.36-8,309.28

Finding the Fourth Proportional to 15,382.86, 21,228.36 and 8,309.28

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Solution

The fourth proportional to 15,382.86, 21,228.36 and 8,309.28 is: 11,466.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,382.86 : 21,228.36 = 8,309.28 : x
  2. Step 2: Convert to fraction form
    15,382.86/21,228.36 = 8,309.28/x
  3. Step 3: Cross multiply
    15,382.86x = 21,228.36 × 8,309.28
  4. Step 4: Simplify right side
    15,382.86x = 176,392,387.18
  5. Step 5: Solve for x
    x = 176,392,387.18/15,382.86
  6. Step 6: Final answer
    x = 11,466.81

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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.