Home / 3,615.90-4,988.28-2,123.79

Finding the Fourth Proportional to 3,615.90, 4,988.28 and 2,123.79

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Solution

The fourth proportional to 3,615.90, 4,988.28 and 2,123.79 is: 2,929.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.90 : 4,988.28 = 2,123.79 : x
  2. Step 2: Convert to fraction form
    3,615.90/4,988.28 = 2,123.79/x
  3. Step 3: Cross multiply
    3,615.90x = 4,988.28 × 2,123.79
  4. Step 4: Simplify right side
    3,615.90x = 10,594,059.18
  5. Step 5: Solve for x
    x = 10,594,059.18/3,615.90
  6. Step 6: Final answer
    x = 2,929.85

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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.