Home / 30,511.08-45,777.60-18,810.72

Finding the Fourth Proportional to 30,511.08, 45,777.60 and 18,810.72

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Solution

The fourth proportional to 30,511.08, 45,777.60 and 18,810.72 is: 28,222.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    30,511.08 : 45,777.60 = 18,810.72 : x
  2. Step 2: Convert to fraction form
    30,511.08/45,777.60 = 18,810.72/x
  3. Step 3: Cross multiply
    30,511.08x = 45,777.60 × 18,810.72
  4. Step 4: Simplify right side
    30,511.08x = 861,109,615.87
  5. Step 5: Solve for x
    x = 861,109,615.87/30,511.08
  6. Step 6: Final answer
    x = 28,222.85

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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.