Home / 3,561.84-4,915.20-1,989.96

Finding the Fourth Proportional to 3,561.84, 4,915.20 and 1,989.96

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Solution

The fourth proportional to 3,561.84, 4,915.20 and 1,989.96 is: 2,746.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,561.84 : 4,915.20 = 1,989.96 : x
  2. Step 2: Convert to fraction form
    3,561.84/4,915.20 = 1,989.96/x
  3. Step 3: Cross multiply
    3,561.84x = 4,915.20 × 1,989.96
  4. Step 4: Simplify right side
    3,561.84x = 9,781,051.39
  5. Step 5: Solve for x
    x = 9,781,051.39/3,561.84
  6. Step 6: Final answer
    x = 2,746.07

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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.