Home / 11,868.60-16,383.90-7,090.20

Finding the Fourth Proportional to 11,868.60, 16,383.90 and 7,090.20

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Solution

The fourth proportional to 11,868.60, 16,383.90 and 7,090.20 is: 9,787.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,868.60 : 16,383.90 = 7,090.20 : x
  2. Step 2: Convert to fraction form
    11,868.60/16,383.90 = 7,090.20/x
  3. Step 3: Cross multiply
    11,868.60x = 16,383.90 × 7,090.20
  4. Step 4: Simplify right side
    11,868.60x = 116,165,127.78
  5. Step 5: Solve for x
    x = 116,165,127.78/11,868.60
  6. Step 6: Final answer
    x = 9,787.60

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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.