Home / 20,928.98-28,881.86-11,368.78

Finding the Fourth Proportional to 20,928.98, 28,881.86 and 11,368.78

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Solution

The fourth proportional to 20,928.98, 28,881.86 and 11,368.78 is: 15,688.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.98 : 28,881.86 = 11,368.78 : x
  2. Step 2: Convert to fraction form
    20,928.98/28,881.86 = 11,368.78/x
  3. Step 3: Cross multiply
    20,928.98x = 28,881.86 × 11,368.78
  4. Step 4: Simplify right side
    20,928.98x = 328,351,512.33
  5. Step 5: Solve for x
    x = 328,351,512.33/20,928.98
  6. Step 6: Final answer
    x = 15,688.84

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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.