Home / 21,520.08-29,699.46-12,089.16

Finding the Fourth Proportional to 21,520.08, 29,699.46 and 12,089.16

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Solution

The fourth proportional to 21,520.08, 29,699.46 and 12,089.16 is: 16,684.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,520.08 : 29,699.46 = 12,089.16 : x
  2. Step 2: Convert to fraction form
    21,520.08/29,699.46 = 12,089.16/x
  3. Step 3: Cross multiply
    21,520.08x = 29,699.46 × 12,089.16
  4. Step 4: Simplify right side
    21,520.08x = 359,041,523.85
  5. Step 5: Solve for x
    x = 359,041,523.85/21,520.08
  6. Step 6: Final answer
    x = 16,684.02

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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.