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Finding the Fourth Proportional to 7,090.32, 9,784.30 and 3,903.55

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Solution

The fourth proportional to 7,090.32, 9,784.30 and 3,903.55 is: 5,386.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,090.32 : 9,784.30 = 3,903.55 : x
  2. Step 2: Convert to fraction form
    7,090.32/9,784.30 = 3,903.55/x
  3. Step 3: Cross multiply
    7,090.32x = 9,784.30 × 3,903.55
  4. Step 4: Simplify right side
    7,090.32x = 38,193,504.27
  5. Step 5: Solve for x
    x = 38,193,504.27/7,090.32
  6. Step 6: Final answer
    x = 5,386.71

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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.