Home / 13,156.15-19,640.57-12,694.85

Finding the Fourth Proportional to 13,156.15, 19,640.57 and 12,694.85

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Solution

The fourth proportional to 13,156.15, 19,640.57 and 12,694.85 is: 18,951.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,156.15 : 19,640.57 = 12,694.85 : x
  2. Step 2: Convert to fraction form
    13,156.15/19,640.57 = 12,694.85/x
  3. Step 3: Cross multiply
    13,156.15x = 19,640.57 × 12,694.85
  4. Step 4: Simplify right side
    13,156.15x = 249,334,090.06
  5. Step 5: Solve for x
    x = 249,334,090.06/13,156.15
  6. Step 6: Final answer
    x = 18,951.91

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.