Home / 28,686.74-39,576.64-21,150.96

Finding the Fourth Proportional to 28,686.74, 39,576.64 and 21,150.96

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Solution

The fourth proportional to 28,686.74, 39,576.64 and 21,150.96 is: 29,180.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,686.74 : 39,576.64 = 21,150.96 : x
  2. Step 2: Convert to fraction form
    28,686.74/39,576.64 = 21,150.96/x
  3. Step 3: Cross multiply
    28,686.74x = 39,576.64 × 21,150.96
  4. Step 4: Simplify right side
    28,686.74x = 837,083,929.57
  5. Step 5: Solve for x
    x = 837,083,929.57/28,686.74
  6. Step 6: Final answer
    x = 29,180.17

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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.