Home / 15,853.50-21,876.95-8,779.37

Finding the Fourth Proportional to 15,853.50, 21,876.95 and 8,779.37

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Solution

The fourth proportional to 15,853.50, 21,876.95 and 8,779.37 is: 12,115.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,853.50 : 21,876.95 = 8,779.37 : x
  2. Step 2: Convert to fraction form
    15,853.50/21,876.95 = 8,779.37/x
  3. Step 3: Cross multiply
    15,853.50x = 21,876.95 × 8,779.37
  4. Step 4: Simplify right side
    15,853.50x = 192,065,751.09
  5. Step 5: Solve for x
    x = 192,065,751.09/15,853.50
  6. Step 6: Final answer
    x = 12,115.04

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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.