Home / 7,720.92-10,639.08-5,485.32

Finding the Fourth Proportional to 7,720.92, 10,639.08 and 5,485.32

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Solution

The fourth proportional to 7,720.92, 10,639.08 and 5,485.32 is: 7,558.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,720.92 : 10,639.08 = 5,485.32 : x
  2. Step 2: Convert to fraction form
    7,720.92/10,639.08 = 5,485.32/x
  3. Step 3: Cross multiply
    7,720.92x = 10,639.08 × 5,485.32
  4. Step 4: Simplify right side
    7,720.92x = 58,358,758.31
  5. Step 5: Solve for x
    x = 58,358,758.31/7,720.92
  6. Step 6: Final answer
    x = 7,558.52

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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.