Home / 20,561.05-30,841.58-4,978.68

Finding the Fourth Proportional to 20,561.05, 30,841.58 and 4,978.68

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Solution

The fourth proportional to 20,561.05, 30,841.58 and 4,978.68 is: 7,468.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,561.05 : 30,841.58 = 4,978.68 : x
  2. Step 2: Convert to fraction form
    20,561.05/30,841.58 = 4,978.68/x
  3. Step 3: Cross multiply
    20,561.05x = 30,841.58 × 4,978.68
  4. Step 4: Simplify right side
    20,561.05x = 153,550,203.31
  5. Step 5: Solve for x
    x = 153,550,203.31/20,561.05
  6. Step 6: Final answer
    x = 7,468.01

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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.