Home / 15,419.12-21,277.20-8,705.41

Finding the Fourth Proportional to 15,419.12, 21,277.20 and 8,705.41

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Solution

The fourth proportional to 15,419.12, 21,277.20 and 8,705.41 is: 12,012.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,419.12 : 21,277.20 = 8,705.41 : x
  2. Step 2: Convert to fraction form
    15,419.12/21,277.20 = 8,705.41/x
  3. Step 3: Cross multiply
    15,419.12x = 21,277.20 × 8,705.41
  4. Step 4: Simplify right side
    15,419.12x = 185,226,599.74
  5. Step 5: Solve for x
    x = 185,226,599.74/15,419.12
  6. Step 6: Final answer
    x = 12,012.79

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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.