Home / 20,661.86-28,512.06-11,709.74

Finding the Fourth Proportional to 20,661.86, 28,512.06 and 11,709.74

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Solution

The fourth proportional to 20,661.86, 28,512.06 and 11,709.74 is: 16,158.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,661.86 : 28,512.06 = 11,709.74 : x
  2. Step 2: Convert to fraction form
    20,661.86/28,512.06 = 11,709.74/x
  3. Step 3: Cross multiply
    20,661.86x = 28,512.06 × 11,709.74
  4. Step 4: Simplify right side
    20,661.86x = 333,868,809.46
  5. Step 5: Solve for x
    x = 333,868,809.46/20,661.86
  6. Step 6: Final answer
    x = 16,158.70

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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.