Home / 21,217.42-31,779.30-13,294.12

Finding the Fourth Proportional to 21,217.42, 31,779.30 and 13,294.12

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Solution

The fourth proportional to 21,217.42, 31,779.30 and 13,294.12 is: 19,911.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,217.42 : 31,779.30 = 13,294.12 : x
  2. Step 2: Convert to fraction form
    21,217.42/31,779.30 = 13,294.12/x
  3. Step 3: Cross multiply
    21,217.42x = 31,779.30 × 13,294.12
  4. Step 4: Simplify right side
    21,217.42x = 422,477,827.72
  5. Step 5: Solve for x
    x = 422,477,827.72/21,217.42
  6. Step 6: Final answer
    x = 19,911.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.