Home / 13,147.20-18,140.63-7,842.51

Finding the Fourth Proportional to 13,147.20, 18,140.63 and 7,842.51

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Solution

The fourth proportional to 13,147.20, 18,140.63 and 7,842.51 is: 10,821.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,147.20 : 18,140.63 = 7,842.51 : x
  2. Step 2: Convert to fraction form
    13,147.20/18,140.63 = 7,842.51/x
  3. Step 3: Cross multiply
    13,147.20x = 18,140.63 × 7,842.51
  4. Step 4: Simplify right side
    13,147.20x = 142,268,032.97
  5. Step 5: Solve for x
    x = 142,268,032.97/13,147.20
  6. Step 6: Final answer
    x = 10,821.17

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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.