Home / 9,406.68-12,981.25-5,157.80

Finding the Fourth Proportional to 9,406.68, 12,981.25 and 5,157.80

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Solution

The fourth proportional to 9,406.68, 12,981.25 and 5,157.80 is: 7,117.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,406.68 : 12,981.25 = 5,157.80 : x
  2. Step 2: Convert to fraction form
    9,406.68/12,981.25 = 5,157.80/x
  3. Step 3: Cross multiply
    9,406.68x = 12,981.25 × 5,157.80
  4. Step 4: Simplify right side
    9,406.68x = 66,954,710.81
  5. Step 5: Solve for x
    x = 66,954,710.81/9,406.68
  6. Step 6: Final answer
    x = 7,117.79

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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.