Home / 15,495.44-21,381.97-8,779.64

Finding the Fourth Proportional to 15,495.44, 21,381.97 and 8,779.64

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Solution

The fourth proportional to 15,495.44, 21,381.97 and 8,779.64 is: 12,114.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,495.44 : 21,381.97 = 8,779.64 : x
  2. Step 2: Convert to fraction form
    15,495.44/21,381.97 = 8,779.64/x
  3. Step 3: Cross multiply
    15,495.44x = 21,381.97 × 8,779.64
  4. Step 4: Simplify right side
    15,495.44x = 187,725,848.28
  5. Step 5: Solve for x
    x = 187,725,848.28/15,495.44
  6. Step 6: Final answer
    x = 12,114.91

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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.