Home / 18,816.96-28,252.80-13,840.32

Finding the Fourth Proportional to 18,816.96, 28,252.80 and 13,840.32

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Solution

The fourth proportional to 18,816.96, 28,252.80 and 13,840.32 is: 20,780.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,816.96 : 28,252.80 = 13,840.32 : x
  2. Step 2: Convert to fraction form
    18,816.96/28,252.80 = 13,840.32/x
  3. Step 3: Cross multiply
    18,816.96x = 28,252.80 × 13,840.32
  4. Step 4: Simplify right side
    18,816.96x = 391,027,792.90
  5. Step 5: Solve for x
    x = 391,027,792.90/18,816.96
  6. Step 6: Final answer
    x = 20,780.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.