Home / 20,857.60-28,783.95-11,904.93

Finding the Fourth Proportional to 20,857.60, 28,783.95 and 11,904.93

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Solution

The fourth proportional to 20,857.60, 28,783.95 and 11,904.93 is: 16,429.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.60 : 28,783.95 = 11,904.93 : x
  2. Step 2: Convert to fraction form
    20,857.60/28,783.95 = 11,904.93/x
  3. Step 3: Cross multiply
    20,857.60x = 28,783.95 × 11,904.93
  4. Step 4: Simplify right side
    20,857.60x = 342,670,909.87
  5. Step 5: Solve for x
    x = 342,670,909.87/20,857.60
  6. Step 6: Final answer
    x = 16,429.07

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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.