Home / 21,739.20-30,000.96-12,307.20

Finding the Fourth Proportional to 21,739.20, 30,000.96 and 12,307.20

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Solution

The fourth proportional to 21,739.20, 30,000.96 and 12,307.20 is: 16,984.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.20 : 30,000.96 = 12,307.20 : x
  2. Step 2: Convert to fraction form
    21,739.20/30,000.96 = 12,307.20/x
  3. Step 3: Cross multiply
    21,739.20x = 30,000.96 × 12,307.20
  4. Step 4: Simplify right side
    21,739.20x = 369,227,814.91
  5. Step 5: Solve for x
    x = 369,227,814.91/21,739.20
  6. Step 6: Final answer
    x = 16,984.43

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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.