Home / 15,788.32-21,790.28-9,821.91

Finding the Fourth Proportional to 15,788.32, 21,790.28 and 9,821.91

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Solution

The fourth proportional to 15,788.32, 21,790.28 and 9,821.91 is: 13,555.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,788.32 : 21,790.28 = 9,821.91 : x
  2. Step 2: Convert to fraction form
    15,788.32/21,790.28 = 9,821.91/x
  3. Step 3: Cross multiply
    15,788.32x = 21,790.28 × 9,821.91
  4. Step 4: Simplify right side
    15,788.32x = 214,022,169.03
  5. Step 5: Solve for x
    x = 214,022,169.03/15,788.32
  6. Step 6: Final answer
    x = 13,555.73

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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.