Home / 20,668.72-28,522.92-12,285.28

Finding the Fourth Proportional to 20,668.72, 28,522.92 and 12,285.28

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Solution

The fourth proportional to 20,668.72, 28,522.92 and 12,285.28 is: 16,953.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,668.72 : 28,522.92 = 12,285.28 : x
  2. Step 2: Convert to fraction form
    20,668.72/28,522.92 = 12,285.28/x
  3. Step 3: Cross multiply
    20,668.72x = 28,522.92 × 12,285.28
  4. Step 4: Simplify right side
    20,668.72x = 350,412,058.62
  5. Step 5: Solve for x
    x = 350,412,058.62/20,668.72
  6. Step 6: Final answer
    x = 16,953.74

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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.