Home / 21,779.84-30,055.59-12,218.93

Finding the Fourth Proportional to 21,779.84, 30,055.59 and 12,218.93

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Solution

The fourth proportional to 21,779.84, 30,055.59 and 12,218.93 is: 16,861.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,779.84 : 30,055.59 = 12,218.93 : x
  2. Step 2: Convert to fraction form
    21,779.84/30,055.59 = 12,218.93/x
  3. Step 3: Cross multiply
    21,779.84x = 30,055.59 × 12,218.93
  4. Step 4: Simplify right side
    21,779.84x = 367,247,000.04
  5. Step 5: Solve for x
    x = 367,247,000.04/21,779.84
  6. Step 6: Final answer
    x = 16,861.79

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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.