Home / 1,515.12-2,090.84-852.12

Finding the Fourth Proportional to 1,515.12, 2,090.84 and 852.12

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Solution

The fourth proportional to 1,515.12, 2,090.84 and 852.12 is: 1,175.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,515.12 : 2,090.84 = 852.12 : x
  2. Step 2: Convert to fraction form
    1,515.12/2,090.84 = 852.12/x
  3. Step 3: Cross multiply
    1,515.12x = 2,090.84 × 852.12
  4. Step 4: Simplify right side
    1,515.12x = 1,781,646.58
  5. Step 5: Solve for x
    x = 1,781,646.58/1,515.12
  6. Step 6: Final answer
    x = 1,175.91

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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.