Home / 20,702.15-28,558.46-13,536.28

Finding the Fourth Proportional to 20,702.15, 28,558.46 and 13,536.28

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Solution

The fourth proportional to 20,702.15, 28,558.46 and 13,536.28 is: 18,673.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,702.15 : 28,558.46 = 13,536.28 : x
  2. Step 2: Convert to fraction form
    20,702.15/28,558.46 = 13,536.28/x
  3. Step 3: Cross multiply
    20,702.15x = 28,558.46 × 13,536.28
  4. Step 4: Simplify right side
    20,702.15x = 386,575,273.37
  5. Step 5: Solve for x
    x = 386,575,273.37/20,702.15
  6. Step 6: Final answer
    x = 18,673.20

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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.