Home / 2,187.81-3,021.40-1,402.31

Finding the Fourth Proportional to 2,187.81, 3,021.40 and 1,402.31

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Solution

The fourth proportional to 2,187.81, 3,021.40 and 1,402.31 is: 1,936.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,187.81 : 3,021.40 = 1,402.31 : x
  2. Step 2: Convert to fraction form
    2,187.81/3,021.40 = 1,402.31/x
  3. Step 3: Cross multiply
    2,187.81x = 3,021.40 × 1,402.31
  4. Step 4: Simplify right side
    2,187.81x = 4,236,948.74
  5. Step 5: Solve for x
    x = 4,236,948.74/2,187.81
  6. Step 6: Final answer
    x = 1,936.62

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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.