Home / 11,128.84-15,341.44-8,471.62

Finding the Fourth Proportional to 11,128.84, 15,341.44 and 8,471.62

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Solution

The fourth proportional to 11,128.84, 15,341.44 and 8,471.62 is: 11,678.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,128.84 : 15,341.44 = 8,471.62 : x
  2. Step 2: Convert to fraction form
    11,128.84/15,341.44 = 8,471.62/x
  3. Step 3: Cross multiply
    11,128.84x = 15,341.44 × 8,471.62
  4. Step 4: Simplify right side
    11,128.84x = 129,966,849.93
  5. Step 5: Solve for x
    x = 129,966,849.93/11,128.84
  6. Step 6: Final answer
    x = 11,678.38

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Double scale
Find fourth proportional to 11,129.84, 15,342.82 and 8,472.62
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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.