Home / 19,899.34-29,819.85-8,220.76

Finding the Fourth Proportional to 19,899.34, 29,819.85 and 8,220.76

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Solution

The fourth proportional to 19,899.34, 29,819.85 and 8,220.76 is: 12,319.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,899.34 : 29,819.85 = 8,220.76 : x
  2. Step 2: Convert to fraction form
    19,899.34/29,819.85 = 8,220.76/x
  3. Step 3: Cross multiply
    19,899.34x = 29,819.85 × 8,220.76
  4. Step 4: Simplify right side
    19,899.34x = 245,141,830.09
  5. Step 5: Solve for x
    x = 245,141,830.09/19,899.34
  6. Step 6: Final answer
    x = 12,319.09

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.