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Finding the Fourth Proportional to 18,785.74, 28,178.88 and 8,926.03

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Solution

The fourth proportional to 18,785.74, 28,178.88 and 8,926.03 is: 13,389.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,785.74 : 28,178.88 = 8,926.03 : x
  2. Step 2: Convert to fraction form
    18,785.74/28,178.88 = 8,926.03/x
  3. Step 3: Cross multiply
    18,785.74x = 28,178.88 × 8,926.03
  4. Step 4: Simplify right side
    18,785.74x = 251,525,528.25
  5. Step 5: Solve for x
    x = 251,525,528.25/18,785.74
  6. Step 6: Final answer
    x = 13,389.17

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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.