Home / 15,505.20-21,398.04-8,788.32

Finding the Fourth Proportional to 15,505.20, 21,398.04 and 8,788.32

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Solution

The fourth proportional to 15,505.20, 21,398.04 and 8,788.32 is: 12,128.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,505.20 : 21,398.04 = 8,788.32 : x
  2. Step 2: Convert to fraction form
    15,505.20/21,398.04 = 8,788.32/x
  3. Step 3: Cross multiply
    15,505.20x = 21,398.04 × 8,788.32
  4. Step 4: Simplify right side
    15,505.20x = 188,052,822.89
  5. Step 5: Solve for x
    x = 188,052,822.89/15,505.20
  6. Step 6: Final answer
    x = 12,128.37

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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.