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Finding the Fourth Proportional to 18,913.44, 28,319.76 and 16,698.72

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Solution

The fourth proportional to 18,913.44, 28,319.76 and 16,698.72 is: 25,003.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,913.44 : 28,319.76 = 16,698.72 : x
  2. Step 2: Convert to fraction form
    18,913.44/28,319.76 = 16,698.72/x
  3. Step 3: Cross multiply
    18,913.44x = 28,319.76 × 16,698.72
  4. Step 4: Simplify right side
    18,913.44x = 472,903,742.71
  5. Step 5: Solve for x
    x = 472,903,742.71/18,913.44
  6. Step 6: Final answer
    x = 25,003.58

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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.