Home / 9,406.85-12,981.62-5,157.83

Finding the Fourth Proportional to 9,406.85, 12,981.62 and 5,157.83

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Solution

The fourth proportional to 9,406.85, 12,981.62 and 5,157.83 is: 7,117.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,406.85 : 12,981.62 = 5,157.83 : x
  2. Step 2: Convert to fraction form
    9,406.85/12,981.62 = 5,157.83/x
  3. Step 3: Cross multiply
    9,406.85x = 12,981.62 × 5,157.83
  4. Step 4: Simplify right side
    9,406.85x = 66,956,898.39
  5. Step 5: Solve for x
    x = 66,956,898.39/9,406.85
  6. Step 6: Final answer
    x = 7,117.89

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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.