Home / 21,985.39-30,339.77-11,914.08

Finding the Fourth Proportional to 21,985.39, 30,339.77 and 11,914.08

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Solution

The fourth proportional to 21,985.39, 30,339.77 and 11,914.08 is: 16,441.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.39 : 30,339.77 = 11,914.08 : x
  2. Step 2: Convert to fraction form
    21,985.39/30,339.77 = 11,914.08/x
  3. Step 3: Cross multiply
    21,985.39x = 30,339.77 × 11,914.08
  4. Step 4: Simplify right side
    21,985.39x = 361,470,387.39
  5. Step 5: Solve for x
    x = 361,470,387.39/21,985.39
  6. Step 6: Final answer
    x = 16,441.39

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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.