Home / 20,639.33-28,483.70-11,686.89

Finding the Fourth Proportional to 20,639.33, 28,483.70 and 11,686.89

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Solution

The fourth proportional to 20,639.33, 28,483.70 and 11,686.89 is: 16,128.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,639.33 : 28,483.70 = 11,686.89 : x
  2. Step 2: Convert to fraction form
    20,639.33/28,483.70 = 11,686.89/x
  3. Step 3: Cross multiply
    20,639.33x = 28,483.70 × 11,686.89
  4. Step 4: Simplify right side
    20,639.33x = 332,885,810.26
  5. Step 5: Solve for x
    x = 332,885,810.26/20,639.33
  6. Step 6: Final answer
    x = 16,128.72

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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.