Home / 20,686.42-28,547.88-11,255.62

Finding the Fourth Proportional to 20,686.42, 28,547.88 and 11,255.62

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Solution

The fourth proportional to 20,686.42, 28,547.88 and 11,255.62 is: 15,533.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.42 : 28,547.88 = 11,255.62 : x
  2. Step 2: Convert to fraction form
    20,686.42/28,547.88 = 11,255.62/x
  3. Step 3: Cross multiply
    20,686.42x = 28,547.88 × 11,255.62
  4. Step 4: Simplify right side
    20,686.42x = 321,324,089.09
  5. Step 5: Solve for x
    x = 321,324,089.09/20,686.42
  6. Step 6: Final answer
    x = 15,533.09

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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.