Home / 13,639.35-18,821.93-7,670.87

Finding the Fourth Proportional to 13,639.35, 18,821.93 and 7,670.87

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Solution

The fourth proportional to 13,639.35, 18,821.93 and 7,670.87 is: 10,585.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,639.35 : 18,821.93 = 7,670.87 : x
  2. Step 2: Convert to fraction form
    13,639.35/18,821.93 = 7,670.87/x
  3. Step 3: Cross multiply
    13,639.35x = 18,821.93 × 7,670.87
  4. Step 4: Simplify right side
    13,639.35x = 144,380,578.18
  5. Step 5: Solve for x
    x = 144,380,578.18/13,639.35
  6. Step 6: Final answer
    x = 10,585.59

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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.