Home / 21,743.19-30,004.76-12,311.78

Finding the Fourth Proportional to 21,743.19, 30,004.76 and 12,311.78

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Solution

The fourth proportional to 21,743.19, 30,004.76 and 12,311.78 is: 16,989.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,743.19 : 30,004.76 = 12,311.78 : x
  2. Step 2: Convert to fraction form
    21,743.19/30,004.76 = 12,311.78/x
  3. Step 3: Cross multiply
    21,743.19x = 30,004.76 × 12,311.78
  4. Step 4: Simplify right side
    21,743.19x = 369,411,884.83
  5. Step 5: Solve for x
    x = 369,411,884.83/21,743.19
  6. Step 6: Final answer
    x = 16,989.77

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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.