Home / 20,779.98-28,679.58-12,283.06

Finding the Fourth Proportional to 20,779.98, 28,679.58 and 12,283.06

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Solution

The fourth proportional to 20,779.98, 28,679.58 and 12,283.06 is: 16,952.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.98 : 28,679.58 = 12,283.06 : x
  2. Step 2: Convert to fraction form
    20,779.98/28,679.58 = 12,283.06/x
  3. Step 3: Cross multiply
    20,779.98x = 28,679.58 × 12,283.06
  4. Step 4: Simplify right side
    20,779.98x = 352,273,001.91
  5. Step 5: Solve for x
    x = 352,273,001.91/20,779.98
  6. Step 6: Final answer
    x = 16,952.52

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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.