Home / 20,928.62-28,885.74-12,858.59

Finding the Fourth Proportional to 20,928.62, 28,885.74 and 12,858.59

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Solution

The fourth proportional to 20,928.62, 28,885.74 and 12,858.59 is: 17,747.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,928.62 : 28,885.74 = 12,858.59 : x
  2. Step 2: Convert to fraction form
    20,928.62/28,885.74 = 12,858.59/x
  3. Step 3: Cross multiply
    20,928.62x = 28,885.74 × 12,858.59
  4. Step 4: Simplify right side
    20,928.62x = 371,429,887.51
  5. Step 5: Solve for x
    x = 371,429,887.51/20,928.62
  6. Step 6: Final answer
    x = 17,747.46

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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.