Home / 15,143.92-20,887.42-10,429.72

Finding the Fourth Proportional to 15,143.92, 20,887.42 and 10,429.72

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Solution

The fourth proportional to 15,143.92, 20,887.42 and 10,429.72 is: 14,385.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,143.92 : 20,887.42 = 10,429.72 : x
  2. Step 2: Convert to fraction form
    15,143.92/20,887.42 = 10,429.72/x
  3. Step 3: Cross multiply
    15,143.92x = 20,887.42 × 10,429.72
  4. Step 4: Simplify right side
    15,143.92x = 217,849,942.12
  5. Step 5: Solve for x
    x = 217,849,942.12/15,143.92
  6. Step 6: Final answer
    x = 14,385.31

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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.