Home / 20,639.36-28,482.62-11,686.61

Finding the Fourth Proportional to 20,639.36, 28,482.62 and 11,686.61

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Solution

The fourth proportional to 20,639.36, 28,482.62 and 11,686.61 is: 16,127.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.36 : 28,482.62 = 11,686.61 : x
  2. Step 2: Convert to fraction form
    20,639.36/28,482.62 = 11,686.61/x
  3. Step 3: Cross multiply
    20,639.36x = 28,482.62 × 11,686.61
  4. Step 4: Simplify right side
    20,639.36x = 332,865,271.72
  5. Step 5: Solve for x
    x = 332,865,271.72/20,639.36
  6. Step 6: Final answer
    x = 16,127.69

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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.