Home / 14,111.20-21,166.80-12,288.70

Finding the Fourth Proportional to 14,111.20, 21,166.80 and 12,288.70

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Solution

The fourth proportional to 14,111.20, 21,166.80 and 12,288.70 is: 18,433.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,111.20 : 21,166.80 = 12,288.70 : x
  2. Step 2: Convert to fraction form
    14,111.20/21,166.80 = 12,288.70/x
  3. Step 3: Cross multiply
    14,111.20x = 21,166.80 × 12,288.70
  4. Step 4: Simplify right side
    14,111.20x = 260,112,455.16
  5. Step 5: Solve for x
    x = 260,112,455.16/14,111.20
  6. Step 6: Final answer
    x = 18,433.05

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.