Home / 20,642.69-28,486.91-11,690.19

Finding the Fourth Proportional to 20,642.69, 28,486.91 and 11,690.19

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Solution

The fourth proportional to 20,642.69, 28,486.91 and 11,690.19 is: 16,132.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,642.69 : 28,486.91 = 11,690.19 : x
  2. Step 2: Convert to fraction form
    20,642.69/28,486.91 = 11,690.19/x
  3. Step 3: Cross multiply
    20,642.69x = 28,486.91 × 11,690.19
  4. Step 4: Simplify right side
    20,642.69x = 333,017,419.64
  5. Step 5: Solve for x
    x = 333,017,419.64/20,642.69
  6. Step 6: Final answer
    x = 16,132.47

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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.