Home / 20,338.66-28,064.40-11,384.51

Finding the Fourth Proportional to 20,338.66, 28,064.40 and 11,384.51

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Solution

The fourth proportional to 20,338.66, 28,064.40 and 11,384.51 is: 15,708.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,338.66 : 28,064.40 = 11,384.51 : x
  2. Step 2: Convert to fraction form
    20,338.66/28,064.40 = 11,384.51/x
  3. Step 3: Cross multiply
    20,338.66x = 28,064.40 × 11,384.51
  4. Step 4: Simplify right side
    20,338.66x = 319,499,442.44
  5. Step 5: Solve for x
    x = 319,499,442.44/20,338.66
  6. Step 6: Final answer
    x = 15,708.97

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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.