Home / 21,004.50-28,986.30-12,625.86

Finding the Fourth Proportional to 21,004.50, 28,986.30 and 12,625.86

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Solution

The fourth proportional to 21,004.50, 28,986.30 and 12,625.86 is: 17,423.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,004.50 : 28,986.30 = 12,625.86 : x
  2. Step 2: Convert to fraction form
    21,004.50/28,986.30 = 12,625.86/x
  3. Step 3: Cross multiply
    21,004.50x = 28,986.30 × 12,625.86
  4. Step 4: Simplify right side
    21,004.50x = 365,976,965.72
  5. Step 5: Solve for x
    x = 365,976,965.72/21,004.50
  6. Step 6: Final answer
    x = 17,423.74

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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.