Home / 20,891.74-28,830.56-11,460.28

Finding the Fourth Proportional to 20,891.74, 28,830.56 and 11,460.28

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Solution

The fourth proportional to 20,891.74, 28,830.56 and 11,460.28 is: 15,815.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,891.74 : 28,830.56 = 11,460.28 : x
  2. Step 2: Convert to fraction form
    20,891.74/28,830.56 = 11,460.28/x
  3. Step 3: Cross multiply
    20,891.74x = 28,830.56 × 11,460.28
  4. Step 4: Simplify right side
    20,891.74x = 330,406,290.16
  5. Step 5: Solve for x
    x = 330,406,290.16/20,891.74
  6. Step 6: Final answer
    x = 15,815.16

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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.