Home / 15,374.80-21,219.23-8,661.72

Finding the Fourth Proportional to 15,374.80, 21,219.23 and 8,661.72

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Solution

The fourth proportional to 15,374.80, 21,219.23 and 8,661.72 is: 11,954.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,374.80 : 21,219.23 = 8,661.72 : x
  2. Step 2: Convert to fraction form
    15,374.80/21,219.23 = 8,661.72/x
  3. Step 3: Cross multiply
    15,374.80x = 21,219.23 × 8,661.72
  4. Step 4: Simplify right side
    15,374.80x = 183,795,028.88
  5. Step 5: Solve for x
    x = 183,795,028.88/15,374.80
  6. Step 6: Final answer
    x = 11,954.30

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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.