Home / 20,678.21-28,513.13-14,293.71

Finding the Fourth Proportional to 20,678.21, 28,513.13 and 14,293.71

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Solution

The fourth proportional to 20,678.21, 28,513.13 and 14,293.71 is: 19,709.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,678.21 : 28,513.13 = 14,293.71 : x
  2. Step 2: Convert to fraction form
    20,678.21/28,513.13 = 14,293.71/x
  3. Step 3: Cross multiply
    20,678.21x = 28,513.13 × 14,293.71
  4. Step 4: Simplify right side
    20,678.21x = 407,558,339.94
  5. Step 5: Solve for x
    x = 407,558,339.94/20,678.21
  6. Step 6: Final answer
    x = 19,709.56

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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.