Home / 13,649.33-18,835.28-7,680.64

Finding the Fourth Proportional to 13,649.33, 18,835.28 and 7,680.64

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Solution

The fourth proportional to 13,649.33, 18,835.28 and 7,680.64 is: 10,598.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,649.33 : 18,835.28 = 7,680.64 : x
  2. Step 2: Convert to fraction form
    13,649.33/18,835.28 = 7,680.64/x
  3. Step 3: Cross multiply
    13,649.33x = 18,835.28 × 7,680.64
  4. Step 4: Simplify right side
    13,649.33x = 144,667,004.98
  5. Step 5: Solve for x
    x = 144,667,004.98/13,649.33
  6. Step 6: Final answer
    x = 10,598.84

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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.