Home / 21,211.90-29,271.85-11,779.86

Finding the Fourth Proportional to 21,211.90, 29,271.85 and 11,779.86

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Solution

The fourth proportional to 21,211.90, 29,271.85 and 11,779.86 is: 16,255.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,211.90 : 29,271.85 = 11,779.86 : x
  2. Step 2: Convert to fraction form
    21,211.90/29,271.85 = 11,779.86/x
  3. Step 3: Cross multiply
    21,211.90x = 29,271.85 × 11,779.86
  4. Step 4: Simplify right side
    21,211.90x = 344,818,294.94
  5. Step 5: Solve for x
    x = 344,818,294.94/21,211.90
  6. Step 6: Final answer
    x = 16,255.89

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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.