Home / 7,880.24-11,820.35-5,407.56

Finding the Fourth Proportional to 7,880.24, 11,820.35 and 5,407.56

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Solution

The fourth proportional to 7,880.24, 11,820.35 and 5,407.56 is: 8,111.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,880.24 : 11,820.35 = 5,407.56 : x
  2. Step 2: Convert to fraction form
    7,880.24/11,820.35 = 5,407.56/x
  3. Step 3: Cross multiply
    7,880.24x = 11,820.35 × 5,407.56
  4. Step 4: Simplify right side
    7,880.24x = 63,919,265.36
  5. Step 5: Solve for x
    x = 63,919,265.36/7,880.24
  6. Step 6: Final answer
    x = 8,111.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.