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Finding the Fourth Proportional to 9,406.53, 12,980.88 and 5,157.93

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Solution

The fourth proportional to 9,406.53, 12,980.88 and 5,157.93 is: 7,117.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,406.53 : 12,980.88 = 5,157.93 : x
  2. Step 2: Convert to fraction form
    9,406.53/12,980.88 = 5,157.93/x
  3. Step 3: Cross multiply
    9,406.53x = 12,980.88 × 5,157.93
  4. Step 4: Simplify right side
    9,406.53x = 66,954,470.38
  5. Step 5: Solve for x
    x = 66,954,470.38/9,406.53
  6. Step 6: Final answer
    x = 7,117.87

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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.