Home / 20,857.17-28,783.35-11,904.49

Finding the Fourth Proportional to 20,857.17, 28,783.35 and 11,904.49

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Solution

The fourth proportional to 20,857.17, 28,783.35 and 11,904.49 is: 16,428.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,857.17 : 28,783.35 = 11,904.49 : x
  2. Step 2: Convert to fraction form
    20,857.17/28,783.35 = 11,904.49/x
  3. Step 3: Cross multiply
    20,857.17x = 28,783.35 × 11,904.49
  4. Step 4: Simplify right side
    20,857.17x = 342,651,102.24
  5. Step 5: Solve for x
    x = 342,651,102.24/20,857.17
  6. Step 6: Final answer
    x = 16,428.46

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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.