Home / 13,608.08-20,405.58-10,639.04

Finding the Fourth Proportional to 13,608.08, 20,405.58 and 10,639.04

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Solution

The fourth proportional to 13,608.08, 20,405.58 and 10,639.04 is: 15,953.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,608.08 : 20,405.58 = 10,639.04 : x
  2. Step 2: Convert to fraction form
    13,608.08/20,405.58 = 10,639.04/x
  3. Step 3: Cross multiply
    13,608.08x = 20,405.58 × 10,639.04
  4. Step 4: Simplify right side
    13,608.08x = 217,095,781.84
  5. Step 5: Solve for x
    x = 217,095,781.84/13,608.08
  6. Step 6: Final answer
    x = 15,953.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.