Home / 20,971.51-28,941.49-12,020.74

Finding the Fourth Proportional to 20,971.51, 28,941.49 and 12,020.74

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Solution

The fourth proportional to 20,971.51, 28,941.49 and 12,020.74 is: 16,589.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,971.51 : 28,941.49 = 12,020.74 : x
  2. Step 2: Convert to fraction form
    20,971.51/28,941.49 = 12,020.74/x
  3. Step 3: Cross multiply
    20,971.51x = 28,941.49 × 12,020.74
  4. Step 4: Simplify right side
    20,971.51x = 347,898,126.50
  5. Step 5: Solve for x
    x = 347,898,126.50/20,971.51
  6. Step 6: Final answer
    x = 16,589.08

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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.