Home / 21,178.87-29,228.18-12,226.95

Finding the Fourth Proportional to 21,178.87, 29,228.18 and 12,226.95

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Solution

The fourth proportional to 21,178.87, 29,228.18 and 12,226.95 is: 16,873.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,178.87 : 29,228.18 = 12,226.95 : x
  2. Step 2: Convert to fraction form
    21,178.87/29,228.18 = 12,226.95/x
  3. Step 3: Cross multiply
    21,178.87x = 29,228.18 × 12,226.95
  4. Step 4: Simplify right side
    21,178.87x = 357,371,434.32
  5. Step 5: Solve for x
    x = 357,371,434.32/21,178.87
  6. Step 6: Final answer
    x = 16,873.96

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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.