Home / 13,620.38-18,802.56-9,090.56

Finding the Fourth Proportional to 13,620.38, 18,802.56 and 9,090.56

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Solution

The fourth proportional to 13,620.38, 18,802.56 and 9,090.56 is: 12,549.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,620.38 : 18,802.56 = 9,090.56 : x
  2. Step 2: Convert to fraction form
    13,620.38/18,802.56 = 9,090.56/x
  3. Step 3: Cross multiply
    13,620.38x = 18,802.56 × 9,090.56
  4. Step 4: Simplify right side
    13,620.38x = 170,925,799.83
  5. Step 5: Solve for x
    x = 170,925,799.83/13,620.38
  6. Step 6: Final answer
    x = 12,549.27

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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.