Home / 20,398.69-28,151.14-11,899.46

Finding the Fourth Proportional to 20,398.69, 28,151.14 and 11,899.46

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Solution

The fourth proportional to 20,398.69, 28,151.14 and 11,899.46 is: 16,421.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.69 : 28,151.14 = 11,899.46 : x
  2. Step 2: Convert to fraction form
    20,398.69/28,151.14 = 11,899.46/x
  3. Step 3: Cross multiply
    20,398.69x = 28,151.14 × 11,899.46
  4. Step 4: Simplify right side
    20,398.69x = 334,983,405.01
  5. Step 5: Solve for x
    x = 334,983,405.01/20,398.69
  6. Step 6: Final answer
    x = 16,421.81

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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.