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Finding the Fourth Proportional to 20,284.50, 30,279.90 and 17,528.88

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Solution

The fourth proportional to 20,284.50, 30,279.90 and 17,528.88 is: 26,166.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,284.50 : 30,279.90 = 17,528.88 : x
  2. Step 2: Convert to fraction form
    20,284.50/30,279.90 = 17,528.88/x
  3. Step 3: Cross multiply
    20,284.50x = 30,279.90 × 17,528.88
  4. Step 4: Simplify right side
    20,284.50x = 530,772,733.51
  5. Step 5: Solve for x
    x = 530,772,733.51/20,284.50
  6. Step 6: Final answer
    x = 26,166.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.