Home / 20,891.07-28,830.11-11,459.63

Finding the Fourth Proportional to 20,891.07, 28,830.11 and 11,459.63

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Solution

The fourth proportional to 20,891.07, 28,830.11 and 11,459.63 is: 15,814.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.07 : 28,830.11 = 11,459.63 : x
  2. Step 2: Convert to fraction form
    20,891.07/28,830.11 = 11,459.63/x
  3. Step 3: Cross multiply
    20,891.07x = 28,830.11 × 11,459.63
  4. Step 4: Simplify right side
    20,891.07x = 330,382,192.01
  5. Step 5: Solve for x
    x = 330,382,192.01/20,891.07
  6. Step 6: Final answer
    x = 15,814.52

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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.