Home / 20,897.75-28,838.33-12,718.28

Finding the Fourth Proportional to 20,897.75, 28,838.33 and 12,718.28

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Solution

The fourth proportional to 20,897.75, 28,838.33 and 12,718.28 is: 17,550.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,897.75 : 28,838.33 = 12,718.28 : x
  2. Step 2: Convert to fraction form
    20,897.75/28,838.33 = 12,718.28/x
  3. Step 3: Cross multiply
    20,897.75x = 28,838.33 × 12,718.28
  4. Step 4: Simplify right side
    20,897.75x = 366,774,059.56
  5. Step 5: Solve for x
    x = 366,774,059.56/20,897.75
  6. Step 6: Final answer
    x = 17,550.89

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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.