Home / 13,629.89-18,809.45-7,661.55

Finding the Fourth Proportional to 13,629.89, 18,809.45 and 7,661.55

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Solution

The fourth proportional to 13,629.89, 18,809.45 and 7,661.55 is: 10,573.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,629.89 : 18,809.45 = 7,661.55 : x
  2. Step 2: Convert to fraction form
    13,629.89/18,809.45 = 7,661.55/x
  3. Step 3: Cross multiply
    13,629.89x = 18,809.45 × 7,661.55
  4. Step 4: Simplify right side
    13,629.89x = 144,109,602.61
  5. Step 5: Solve for x
    x = 144,109,602.61/13,629.89
  6. Step 6: Final answer
    x = 10,573.06

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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.