Home / 20,479.78-28,261.71-11,528.27

Finding the Fourth Proportional to 20,479.78, 28,261.71 and 11,528.27

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Solution

The fourth proportional to 20,479.78, 28,261.71 and 11,528.27 is: 15,908.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,479.78 : 28,261.71 = 11,528.27 : x
  2. Step 2: Convert to fraction form
    20,479.78/28,261.71 = 11,528.27/x
  3. Step 3: Cross multiply
    20,479.78x = 28,261.71 × 11,528.27
  4. Step 4: Simplify right side
    20,479.78x = 325,808,482.23
  5. Step 5: Solve for x
    x = 325,808,482.23/20,479.78
  6. Step 6: Final answer
    x = 15,908.79

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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.