Home / 8,612.40-11,880.92-5,628.36

Finding the Fourth Proportional to 8,612.40, 11,880.92 and 5,628.36

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Solution

The fourth proportional to 8,612.40, 11,880.92 and 5,628.36 is: 7,764.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,612.40 : 11,880.92 = 5,628.36 : x
  2. Step 2: Convert to fraction form
    8,612.40/11,880.92 = 5,628.36/x
  3. Step 3: Cross multiply
    8,612.40x = 11,880.92 × 5,628.36
  4. Step 4: Simplify right side
    8,612.40x = 66,870,094.89
  5. Step 5: Solve for x
    x = 66,870,094.89/8,612.40
  6. Step 6: Final answer
    x = 7,764.40

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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.