Home / 21,790.80-32,690.60-8,643.64

Finding the Fourth Proportional to 21,790.80, 32,690.60 and 8,643.64

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Solution

The fourth proportional to 21,790.80, 32,690.60 and 8,643.64 is: 12,967.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,790.80 : 32,690.60 = 8,643.64 : x
  2. Step 2: Convert to fraction form
    21,790.80/32,690.60 = 8,643.64/x
  3. Step 3: Cross multiply
    21,790.80x = 32,690.60 × 8,643.64
  4. Step 4: Simplify right side
    21,790.80x = 282,565,777.78
  5. Step 5: Solve for x
    x = 282,565,777.78/21,790.80
  6. Step 6: Final answer
    x = 12,967.21

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.