Home / 2,118.64-2,921.52-1,420.96

Finding the Fourth Proportional to 2,118.64, 2,921.52 and 1,420.96

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Solution

The fourth proportional to 2,118.64, 2,921.52 and 1,420.96 is: 1,959.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,118.64 : 2,921.52 = 1,420.96 : x
  2. Step 2: Convert to fraction form
    2,118.64/2,921.52 = 1,420.96/x
  3. Step 3: Cross multiply
    2,118.64x = 2,921.52 × 1,420.96
  4. Step 4: Simplify right side
    2,118.64x = 4,151,363.06
  5. Step 5: Solve for x
    x = 4,151,363.06/2,118.64
  6. Step 6: Final answer
    x = 1,959.45

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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.