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Finding the Fourth Proportional to 18,873.63, 28,283.58 and 13,904.19

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Solution

The fourth proportional to 18,873.63, 28,283.58 and 13,904.19 is: 20,836.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,873.63 : 28,283.58 = 13,904.19 : x
  2. Step 2: Convert to fraction form
    18,873.63/28,283.58 = 13,904.19/x
  3. Step 3: Cross multiply
    18,873.63x = 28,283.58 × 13,904.19
  4. Step 4: Simplify right side
    18,873.63x = 393,260,270.20
  5. Step 5: Solve for x
    x = 393,260,270.20/18,873.63
  6. Step 6: Final answer
    x = 20,836.49

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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.