Home / 2,887.81-3,985.18-1,561.52

Finding the Fourth Proportional to 2,887.81, 3,985.18 and 1,561.52

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Solution

The fourth proportional to 2,887.81, 3,985.18 and 1,561.52 is: 2,154.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,887.81 : 3,985.18 = 1,561.52 : x
  2. Step 2: Convert to fraction form
    2,887.81/3,985.18 = 1,561.52/x
  3. Step 3: Cross multiply
    2,887.81x = 3,985.18 × 1,561.52
  4. Step 4: Simplify right side
    2,887.81x = 6,222,930.47
  5. Step 5: Solve for x
    x = 6,222,930.47/2,887.81
  6. Step 6: Final answer
    x = 2,154.90

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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.