Home / 21,748.45-30,012.53-12,188.32

Finding the Fourth Proportional to 21,748.45, 30,012.53 and 12,188.32

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Solution

The fourth proportional to 21,748.45, 30,012.53 and 12,188.32 is: 16,819.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,748.45 : 30,012.53 = 12,188.32 : x
  2. Step 2: Convert to fraction form
    21,748.45/30,012.53 = 12,188.32/x
  3. Step 3: Cross multiply
    21,748.45x = 30,012.53 × 12,188.32
  4. Step 4: Simplify right side
    21,748.45x = 365,802,352.50
  5. Step 5: Solve for x
    x = 365,802,352.50/21,748.45
  6. Step 6: Final answer
    x = 16,819.70

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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.