Home / 19,789.90-29,692.68-8,688.85

Finding the Fourth Proportional to 19,789.90, 29,692.68 and 8,688.85

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Solution

The fourth proportional to 19,789.90, 29,692.68 and 8,688.85 is: 13,036.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,789.90 : 29,692.68 = 8,688.85 : x
  2. Step 2: Convert to fraction form
    19,789.90/29,692.68 = 8,688.85/x
  3. Step 3: Cross multiply
    19,789.90x = 29,692.68 × 8,688.85
  4. Step 4: Simplify right side
    19,789.90x = 257,995,242.62
  5. Step 5: Solve for x
    x = 257,995,242.62/19,789.90
  6. Step 6: Final answer
    x = 13,036.71

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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.