Home / 19,000.20-28,500.30-12,779.40

Finding the Fourth Proportional to 19,000.20, 28,500.30 and 12,779.40

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Solution

The fourth proportional to 19,000.20, 28,500.30 and 12,779.40 is: 19,169.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,000.20 : 28,500.30 = 12,779.40 : x
  2. Step 2: Convert to fraction form
    19,000.20/28,500.30 = 12,779.40/x
  3. Step 3: Cross multiply
    19,000.20x = 28,500.30 × 12,779.40
  4. Step 4: Simplify right side
    19,000.20x = 364,216,733.82
  5. Step 5: Solve for x
    x = 364,216,733.82/19,000.20
  6. Step 6: Final answer
    x = 19,169.10

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Double scale
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Similar ratio
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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.