Home / 20,908.84-28,854.12-11,477.38

Finding the Fourth Proportional to 20,908.84, 28,854.12 and 11,477.38

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Solution

The fourth proportional to 20,908.84, 28,854.12 and 11,477.38 is: 15,838.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,908.84 : 28,854.12 = 11,477.38 : x
  2. Step 2: Convert to fraction form
    20,908.84/28,854.12 = 11,477.38/x
  3. Step 3: Cross multiply
    20,908.84x = 28,854.12 × 11,477.38
  4. Step 4: Simplify right side
    20,908.84x = 331,169,699.81
  5. Step 5: Solve for x
    x = 331,169,699.81/20,908.84
  6. Step 6: Final answer
    x = 15,838.74

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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.