Home / 20,386.69-28,133.69-11,894.65

Finding the Fourth Proportional to 20,386.69, 28,133.69 and 11,894.65

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Solution

The fourth proportional to 20,386.69, 28,133.69 and 11,894.65 is: 16,414.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,386.69 : 28,133.69 = 11,894.65 : x
  2. Step 2: Convert to fraction form
    20,386.69/28,133.69 = 11,894.65/x
  3. Step 3: Cross multiply
    20,386.69x = 28,133.69 × 11,894.65
  4. Step 4: Simplify right side
    20,386.69x = 334,640,265.95
  5. Step 5: Solve for x
    x = 334,640,265.95/20,386.69
  6. Step 6: Final answer
    x = 16,414.65

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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.