Home / 2,020-2,787.12-1,135.72

Finding the Fourth Proportional to 2,020, 2,787.12 and 1,135.72

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Solution

The fourth proportional to 2,020, 2,787.12 and 1,135.72 is: 1,567.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,020 : 2,787.12 = 1,135.72 : x
  2. Step 2: Convert to fraction form
    2,020/2,787.12 = 1,135.72/x
  3. Step 3: Cross multiply
    2,020x = 2,787.12 × 1,135.72
  4. Step 4: Simplify right side
    2,020x = 3,165,387.93
  5. Step 5: Solve for x
    x = 3,165,387.93/2,020
  6. Step 6: Final answer
    x = 1,567.02

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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.