Home / 21,739.84-30,000.72-12,310.24

Finding the Fourth Proportional to 21,739.84, 30,000.72 and 12,310.24

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Solution

The fourth proportional to 21,739.84, 30,000.72 and 12,310.24 is: 16,987.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,739.84 : 30,000.72 = 12,310.24 : x
  2. Step 2: Convert to fraction form
    21,739.84/30,000.72 = 12,310.24/x
  3. Step 3: Cross multiply
    21,739.84x = 30,000.72 × 12,310.24
  4. Step 4: Simplify right side
    21,739.84x = 369,316,063.37
  5. Step 5: Solve for x
    x = 369,316,063.37/21,739.84
  6. Step 6: Final answer
    x = 16,987.98

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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.