Home / 15,853.44-21,877.92-8,779.98

Finding the Fourth Proportional to 15,853.44, 21,877.92 and 8,779.98

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Solution

The fourth proportional to 15,853.44, 21,877.92 and 8,779.98 is: 12,116.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.44 : 21,877.92 = 8,779.98 : x
  2. Step 2: Convert to fraction form
    15,853.44/21,877.92 = 8,779.98/x
  3. Step 3: Cross multiply
    15,853.44x = 21,877.92 × 8,779.98
  4. Step 4: Simplify right side
    15,853.44x = 192,087,700.04
  5. Step 5: Solve for x
    x = 192,087,700.04/15,853.44
  6. Step 6: Final answer
    x = 12,116.47

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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.