Home / 20,639.57-28,482.71-11,208.13

Finding the Fourth Proportional to 20,639.57, 28,482.71 and 11,208.13

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Solution

The fourth proportional to 20,639.57, 28,482.71 and 11,208.13 is: 15,467.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.57 : 28,482.71 = 11,208.13 : x
  2. Step 2: Convert to fraction form
    20,639.57/28,482.71 = 11,208.13/x
  3. Step 3: Cross multiply
    20,639.57x = 28,482.71 × 11,208.13
  4. Step 4: Simplify right side
    20,639.57x = 319,237,789.18
  5. Step 5: Solve for x
    x = 319,237,789.18/20,639.57
  6. Step 6: Final answer
    x = 15,467.27

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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.