Home / 14,120.29-21,138.82-12,368.72

Finding the Fourth Proportional to 14,120.29, 21,138.82 and 12,368.72

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Solution

The fourth proportional to 14,120.29, 21,138.82 and 12,368.72 is: 18,516.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,120.29 : 21,138.82 = 12,368.72 : x
  2. Step 2: Convert to fraction form
    14,120.29/21,138.82 = 12,368.72/x
  3. Step 3: Cross multiply
    14,120.29x = 21,138.82 × 12,368.72
  4. Step 4: Simplify right side
    14,120.29x = 261,460,145.71
  5. Step 5: Solve for x
    x = 261,460,145.71/14,120.29
  6. Step 6: Final answer
    x = 18,516.63

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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.