Home / 9,639.86-13,302.92-5,390.87

Finding the Fourth Proportional to 9,639.86, 13,302.92 and 5,390.87

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Solution

The fourth proportional to 9,639.86, 13,302.92 and 5,390.87 is: 7,439.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,639.86 : 13,302.92 = 5,390.87 : x
  2. Step 2: Convert to fraction form
    9,639.86/13,302.92 = 5,390.87/x
  3. Step 3: Cross multiply
    9,639.86x = 13,302.92 × 5,390.87
  4. Step 4: Simplify right side
    9,639.86x = 71,714,285.39
  5. Step 5: Solve for x
    x = 71,714,285.39/9,639.86
  6. Step 6: Final answer
    x = 7,439.35

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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.