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Finding the Fourth Proportional to 7,055.40, 9,735.54 and 3,911.40

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Solution

The fourth proportional to 7,055.40, 9,735.54 and 3,911.40 is: 5,397.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,055.40 : 9,735.54 = 3,911.40 : x
  2. Step 2: Convert to fraction form
    7,055.40/9,735.54 = 3,911.40/x
  3. Step 3: Cross multiply
    7,055.40x = 9,735.54 × 3,911.40
  4. Step 4: Simplify right side
    7,055.40x = 38,079,591.16
  5. Step 5: Solve for x
    x = 38,079,591.16/7,055.40
  6. Step 6: Final answer
    x = 5,397.23

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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.