Home / 20,956.92-28,920.54-12,004.68

Finding the Fourth Proportional to 20,956.92, 28,920.54 and 12,004.68

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Solution

The fourth proportional to 20,956.92, 28,920.54 and 12,004.68 is: 16,566.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,956.92 : 28,920.54 = 12,004.68 : x
  2. Step 2: Convert to fraction form
    20,956.92/28,920.54 = 12,004.68/x
  3. Step 3: Cross multiply
    20,956.92x = 28,920.54 × 12,004.68
  4. Step 4: Simplify right side
    20,956.92x = 347,181,828.13
  5. Step 5: Solve for x
    x = 347,181,828.13/20,956.92
  6. Step 6: Final answer
    x = 16,566.45

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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.