Home / 13,636.89-18,823.20-9,921.69

Finding the Fourth Proportional to 13,636.89, 18,823.20 and 9,921.69

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Solution

The fourth proportional to 13,636.89, 18,823.20 and 9,921.69 is: 13,695.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,636.89 : 18,823.20 = 9,921.69 : x
  2. Step 2: Convert to fraction form
    13,636.89/18,823.20 = 9,921.69/x
  3. Step 3: Cross multiply
    13,636.89x = 18,823.20 × 9,921.69
  4. Step 4: Simplify right side
    13,636.89x = 186,757,955.21
  5. Step 5: Solve for x
    x = 186,757,955.21/13,636.89
  6. Step 6: Final answer
    x = 13,695.05

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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.