Home / 1,921.79-2,652.12-1,135.85

Finding the Fourth Proportional to 1,921.79, 2,652.12 and 1,135.85

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Solution

The fourth proportional to 1,921.79, 2,652.12 and 1,135.85 is: 1,567.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.79 : 2,652.12 = 1,135.85 : x
  2. Step 2: Convert to fraction form
    1,921.79/2,652.12 = 1,135.85/x
  3. Step 3: Cross multiply
    1,921.79x = 2,652.12 × 1,135.85
  4. Step 4: Simplify right side
    1,921.79x = 3,012,397.24
  5. Step 5: Solve for x
    x = 3,012,397.24/1,921.79
  6. Step 6: Final answer
    x = 1,567.49

Related Problems

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Half scale
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Double scale
Find fourth proportional to 1,922.79, 2,653.50 and 1,136.85
Similar ratio
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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.