Home / 20,639.70-28,482.90-11,208.26

Finding the Fourth Proportional to 20,639.70, 28,482.90 and 11,208.26

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Solution

The fourth proportional to 20,639.70, 28,482.90 and 11,208.26 is: 15,467.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.70 : 28,482.90 = 11,208.26 : x
  2. Step 2: Convert to fraction form
    20,639.70/28,482.90 = 11,208.26/x
  3. Step 3: Cross multiply
    20,639.70x = 28,482.90 × 11,208.26
  4. Step 4: Simplify right side
    20,639.70x = 319,243,748.75
  5. Step 5: Solve for x
    x = 319,243,748.75/20,639.70
  6. Step 6: Final answer
    x = 15,467.46

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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.