Home / 5,143.80-7,715.70-1,857.23

Finding the Fourth Proportional to 5,143.80, 7,715.70 and 1,857.23

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Solution

The fourth proportional to 5,143.80, 7,715.70 and 1,857.23 is: 2,785.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,143.80 : 7,715.70 = 1,857.23 : x
  2. Step 2: Convert to fraction form
    5,143.80/7,715.70 = 1,857.23/x
  3. Step 3: Cross multiply
    5,143.80x = 7,715.70 × 1,857.23
  4. Step 4: Simplify right side
    5,143.80x = 14,329,829.51
  5. Step 5: Solve for x
    x = 14,329,829.51/5,143.80
  6. Step 6: Final answer
    x = 2,785.85

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Half scale
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Double scale
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Similar ratio
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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.