Home / 20,852.96-28,782.47-12,890.52

Finding the Fourth Proportional to 20,852.96, 28,782.47 and 12,890.52

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Solution

The fourth proportional to 20,852.96, 28,782.47 and 12,890.52 is: 17,792.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,852.96 : 28,782.47 = 12,890.52 : x
  2. Step 2: Convert to fraction form
    20,852.96/28,782.47 = 12,890.52/x
  3. Step 3: Cross multiply
    20,852.96x = 28,782.47 × 12,890.52
  4. Step 4: Simplify right side
    20,852.96x = 371,020,940.73
  5. Step 5: Solve for x
    x = 371,020,940.73/20,852.96
  6. Step 6: Final answer
    x = 17,792.25

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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.