Home / 2,101.60-2,900.88-1,355.58

Finding the Fourth Proportional to 2,101.60, 2,900.88 and 1,355.58

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Solution

The fourth proportional to 2,101.60, 2,900.88 and 1,355.58 is: 1,871.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,101.60 : 2,900.88 = 1,355.58 : x
  2. Step 2: Convert to fraction form
    2,101.60/2,900.88 = 1,355.58/x
  3. Step 3: Cross multiply
    2,101.60x = 2,900.88 × 1,355.58
  4. Step 4: Simplify right side
    2,101.60x = 3,932,374.91
  5. Step 5: Solve for x
    x = 3,932,374.91/2,101.60
  6. Step 6: Final answer
    x = 1,871.13

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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.