Home / 11,426-15,767.66-6,390.22

Finding the Fourth Proportional to 11,426, 15,767.66 and 6,390.22

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Solution

The fourth proportional to 11,426, 15,767.66 and 6,390.22 is: 8,818.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,426 : 15,767.66 = 6,390.22 : x
  2. Step 2: Convert to fraction form
    11,426/15,767.66 = 6,390.22/x
  3. Step 3: Cross multiply
    11,426x = 15,767.66 × 6,390.22
  4. Step 4: Simplify right side
    11,426x = 100,758,816.29
  5. Step 5: Solve for x
    x = 100,758,816.29/11,426
  6. Step 6: Final answer
    x = 8,818.38

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Double scale
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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.