Home / 1,921.50-2,651.34-1,135.74

Finding the Fourth Proportional to 1,921.50, 2,651.34 and 1,135.74

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Solution

The fourth proportional to 1,921.50, 2,651.34 and 1,135.74 is: 1,567.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,921.50 : 2,651.34 = 1,135.74 : x
  2. Step 2: Convert to fraction form
    1,921.50/2,651.34 = 1,135.74/x
  3. Step 3: Cross multiply
    1,921.50x = 2,651.34 × 1,135.74
  4. Step 4: Simplify right side
    1,921.50x = 3,011,232.89
  5. Step 5: Solve for x
    x = 3,011,232.89/1,921.50
  6. Step 6: Final answer
    x = 1,567.13

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Double scale
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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.