Home / 21,729.30-30,011.10-14,643.42

Finding the Fourth Proportional to 21,729.30, 30,011.10 and 14,643.42

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Solution

The fourth proportional to 21,729.30, 30,011.10 and 14,643.42 is: 20,224.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,729.30 : 30,011.10 = 14,643.42 : x
  2. Step 2: Convert to fraction form
    21,729.30/30,011.10 = 14,643.42/x
  3. Step 3: Cross multiply
    21,729.30x = 30,011.10 × 14,643.42
  4. Step 4: Simplify right side
    21,729.30x = 439,465,141.96
  5. Step 5: Solve for x
    x = 439,465,141.96/21,729.30
  6. Step 6: Final answer
    x = 20,224.54

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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.