Home / 5,518.40-7,615.56-3,160.40

Finding the Fourth Proportional to 5,518.40, 7,615.56 and 3,160.40

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Solution

The fourth proportional to 5,518.40, 7,615.56 and 3,160.40 is: 4,361.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,518.40 : 7,615.56 = 3,160.40 : x
  2. Step 2: Convert to fraction form
    5,518.40/7,615.56 = 3,160.40/x
  3. Step 3: Cross multiply
    5,518.40x = 7,615.56 × 3,160.40
  4. Step 4: Simplify right side
    5,518.40x = 24,068,215.82
  5. Step 5: Solve for x
    x = 24,068,215.82/5,518.40
  6. Step 6: Final answer
    x = 4,361.45

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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.