Home / 20,678.48-28,537.78-11,726.76

Finding the Fourth Proportional to 20,678.48, 28,537.78 and 11,726.76

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Solution

The fourth proportional to 20,678.48, 28,537.78 and 11,726.76 is: 16,183.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.48 : 28,537.78 = 11,726.76 : x
  2. Step 2: Convert to fraction form
    20,678.48/28,537.78 = 11,726.76/x
  3. Step 3: Cross multiply
    20,678.48x = 28,537.78 × 11,726.76
  4. Step 4: Simplify right side
    20,678.48x = 334,655,696.99
  5. Step 5: Solve for x
    x = 334,655,696.99/20,678.48
  6. Step 6: Final answer
    x = 16,183.77

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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.