Home / 21,779.09-30,054.56-12,218.17

Finding the Fourth Proportional to 21,779.09, 30,054.56 and 12,218.17

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Solution

The fourth proportional to 21,779.09, 30,054.56 and 12,218.17 is: 16,860.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.09 : 30,054.56 = 12,218.17 : x
  2. Step 2: Convert to fraction form
    21,779.09/30,054.56 = 12,218.17/x
  3. Step 3: Cross multiply
    21,779.09x = 30,054.56 × 12,218.17
  4. Step 4: Simplify right side
    21,779.09x = 367,211,699.83
  5. Step 5: Solve for x
    x = 367,211,699.83/21,779.09
  6. Step 6: Final answer
    x = 16,860.75

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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.