Home / 15,782.37-21,779.79-8,709.05

Finding the Fourth Proportional to 15,782.37, 21,779.79 and 8,709.05

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Solution

The fourth proportional to 15,782.37, 21,779.79 and 8,709.05 is: 12,018.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,782.37 : 21,779.79 = 8,709.05 : x
  2. Step 2: Convert to fraction form
    15,782.37/21,779.79 = 8,709.05/x
  3. Step 3: Cross multiply
    15,782.37x = 21,779.79 × 8,709.05
  4. Step 4: Simplify right side
    15,782.37x = 189,681,171.20
  5. Step 5: Solve for x
    x = 189,681,171.20/15,782.37
  6. Step 6: Final answer
    x = 12,018.55

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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.