Home / 21,821.63-30,113.96-12,261.92

Finding the Fourth Proportional to 21,821.63, 30,113.96 and 12,261.92

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Solution

The fourth proportional to 21,821.63, 30,113.96 and 12,261.92 is: 16,921.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,821.63 : 30,113.96 = 12,261.92 : x
  2. Step 2: Convert to fraction form
    21,821.63/30,113.96 = 12,261.92/x
  3. Step 3: Cross multiply
    21,821.63x = 30,113.96 × 12,261.92
  4. Step 4: Simplify right side
    21,821.63x = 369,254,756.52
  5. Step 5: Solve for x
    x = 369,254,756.52/21,821.63
  6. Step 6: Final answer
    x = 16,921.51

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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.