Home / 20,342.19-28,068.99-11,390.07

Finding the Fourth Proportional to 20,342.19, 28,068.99 and 11,390.07

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Solution

The fourth proportional to 20,342.19, 28,068.99 and 11,390.07 is: 15,716.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,342.19 : 28,068.99 = 11,390.07 : x
  2. Step 2: Convert to fraction form
    20,342.19/28,068.99 = 11,390.07/x
  3. Step 3: Cross multiply
    20,342.19x = 28,068.99 × 11,390.07
  4. Step 4: Simplify right side
    20,342.19x = 319,707,760.93
  5. Step 5: Solve for x
    x = 319,707,760.93/20,342.19
  6. Step 6: Final answer
    x = 15,716.49

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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.