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Finding the Fourth Proportional to 28,698.76, 43,041.93 and 20,355.49

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Solution

The fourth proportional to 28,698.76, 43,041.93 and 20,355.49 is: 30,528.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,698.76 : 43,041.93 = 20,355.49 : x
  2. Step 2: Convert to fraction form
    28,698.76/43,041.93 = 20,355.49/x
  3. Step 3: Cross multiply
    28,698.76x = 43,041.93 × 20,355.49
  4. Step 4: Simplify right side
    28,698.76x = 876,139,575.70
  5. Step 5: Solve for x
    x = 876,139,575.70/28,698.76
  6. Step 6: Final answer
    x = 30,528.83

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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.