Home / 5,412.78-8,120.37-1,715.23

Finding the Fourth Proportional to 5,412.78, 8,120.37 and 1,715.23

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Solution

The fourth proportional to 5,412.78, 8,120.37 and 1,715.23 is: 2,573.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,412.78 : 8,120.37 = 1,715.23 : x
  2. Step 2: Convert to fraction form
    5,412.78/8,120.37 = 1,715.23/x
  3. Step 3: Cross multiply
    5,412.78x = 8,120.37 × 1,715.23
  4. Step 4: Simplify right side
    5,412.78x = 13,928,302.24
  5. Step 5: Solve for x
    x = 13,928,302.24/5,412.78
  6. Step 6: Final answer
    x = 2,573.23

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Half scale
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Double scale
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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.