Home / 3,615.40-4,989.78-2,124.13

Finding the Fourth Proportional to 3,615.40, 4,989.78 and 2,124.13

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Solution

The fourth proportional to 3,615.40, 4,989.78 and 2,124.13 is: 2,931.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,615.40 : 4,989.78 = 2,124.13 : x
  2. Step 2: Convert to fraction form
    3,615.40/4,989.78 = 2,124.13/x
  3. Step 3: Cross multiply
    3,615.40x = 4,989.78 × 2,124.13
  4. Step 4: Simplify right side
    3,615.40x = 10,598,941.39
  5. Step 5: Solve for x
    x = 10,598,941.39/3,615.40
  6. Step 6: Final answer
    x = 2,931.61

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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.