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Finding the Fourth Proportional to 20,573.30, 28,395.09 and 12,077.30

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Solution

The fourth proportional to 20,573.30, 28,395.09 and 12,077.30 is: 16,668.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,573.30 : 28,395.09 = 12,077.30 : x
  2. Step 2: Convert to fraction form
    20,573.30/28,395.09 = 12,077.30/x
  3. Step 3: Cross multiply
    20,573.30x = 28,395.09 × 12,077.30
  4. Step 4: Simplify right side
    20,573.30x = 342,936,020.46
  5. Step 5: Solve for x
    x = 342,936,020.46/20,573.30
  6. Step 6: Final answer
    x = 16,668.98

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.