Home / 20,702.88-28,570.04-11,271.50

Finding the Fourth Proportional to 20,702.88, 28,570.04 and 11,271.50

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Solution

The fourth proportional to 20,702.88, 28,570.04 and 11,271.50 is: 15,554.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.88 : 28,570.04 = 11,271.50 : x
  2. Step 2: Convert to fraction form
    20,702.88/28,570.04 = 11,271.50/x
  3. Step 3: Cross multiply
    20,702.88x = 28,570.04 × 11,271.50
  4. Step 4: Simplify right side
    20,702.88x = 322,027,205.86
  5. Step 5: Solve for x
    x = 322,027,205.86/20,702.88
  6. Step 6: Final answer
    x = 15,554.71

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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.