Home / 13,639.25-18,820.63-7,670.79

Finding the Fourth Proportional to 13,639.25, 18,820.63 and 7,670.79

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Solution

The fourth proportional to 13,639.25, 18,820.63 and 7,670.79 is: 10,584.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.25 : 18,820.63 = 7,670.79 : x
  2. Step 2: Convert to fraction form
    13,639.25/18,820.63 = 7,670.79/x
  3. Step 3: Cross multiply
    13,639.25x = 18,820.63 × 7,670.79
  4. Step 4: Simplify right side
    13,639.25x = 144,368,967.94
  5. Step 5: Solve for x
    x = 144,368,967.94/13,639.25
  6. Step 6: Final answer
    x = 10,584.82

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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.