Home / 20,384.70-28,118.93-12,819.03

Finding the Fourth Proportional to 20,384.70, 28,118.93 and 12,819.03

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Solution

The fourth proportional to 20,384.70, 28,118.93 and 12,819.03 is: 17,682.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,384.70 : 28,118.93 = 12,819.03 : x
  2. Step 2: Convert to fraction form
    20,384.70/28,118.93 = 12,819.03/x
  3. Step 3: Cross multiply
    20,384.70x = 28,118.93 × 12,819.03
  4. Step 4: Simplify right side
    20,384.70x = 360,457,407.24
  5. Step 5: Solve for x
    x = 360,457,407.24/20,384.70
  6. Step 6: Final answer
    x = 17,682.74

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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.