Home / 20,485.12-30,696.24-12,148.72

Finding the Fourth Proportional to 20,485.12, 30,696.24 and 12,148.72

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Solution

The fourth proportional to 20,485.12, 30,696.24 and 12,148.72 is: 18,204.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,485.12 : 30,696.24 = 12,148.72 : x
  2. Step 2: Convert to fraction form
    20,485.12/30,696.24 = 12,148.72/x
  3. Step 3: Cross multiply
    20,485.12x = 30,696.24 × 12,148.72
  4. Step 4: Simplify right side
    20,485.12x = 372,920,024.81
  5. Step 5: Solve for x
    x = 372,920,024.81/20,485.12
  6. Step 6: Final answer
    x = 18,204.43

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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.