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Finding the Fourth Proportional to 18,718.53, 28,070.64 and 6,236.16

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Solution

The fourth proportional to 18,718.53, 28,070.64 and 6,236.16 is: 9,351.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,718.53 : 28,070.64 = 6,236.16 : x
  2. Step 2: Convert to fraction form
    18,718.53/28,070.64 = 6,236.16/x
  3. Step 3: Cross multiply
    18,718.53x = 28,070.64 × 6,236.16
  4. Step 4: Simplify right side
    18,718.53x = 175,053,002.34
  5. Step 5: Solve for x
    x = 175,053,002.34/18,718.53
  6. Step 6: Final answer
    x = 9,351.86

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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.