Home / 2,115.13-2,920.67-1,487.05

Finding the Fourth Proportional to 2,115.13, 2,920.67 and 1,487.05

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Solution

The fourth proportional to 2,115.13, 2,920.67 and 1,487.05 is: 2,053.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,115.13 : 2,920.67 = 1,487.05 : x
  2. Step 2: Convert to fraction form
    2,115.13/2,920.67 = 1,487.05/x
  3. Step 3: Cross multiply
    2,115.13x = 2,920.67 × 1,487.05
  4. Step 4: Simplify right side
    2,115.13x = 4,343,171.15
  5. Step 5: Solve for x
    x = 4,343,171.15/2,115.13
  6. Step 6: Final answer
    x = 2,053.39

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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.