Home / 15,782.36-21,779.32-8,709.44

Finding the Fourth Proportional to 15,782.36, 21,779.32 and 8,709.44

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Solution

The fourth proportional to 15,782.36, 21,779.32 and 8,709.44 is: 12,018.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,782.36 : 21,779.32 = 8,709.44 : x
  2. Step 2: Convert to fraction form
    15,782.36/21,779.32 = 8,709.44/x
  3. Step 3: Cross multiply
    15,782.36x = 21,779.32 × 8,709.44
  4. Step 4: Simplify right side
    15,782.36x = 189,685,680.78
  5. Step 5: Solve for x
    x = 189,685,680.78/15,782.36
  6. Step 6: Final answer
    x = 12,018.84

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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.