Home / 19,000.70-28,501.05-12,779.90

Finding the Fourth Proportional to 19,000.70, 28,501.05 and 12,779.90

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Solution

The fourth proportional to 19,000.70, 28,501.05 and 12,779.90 is: 19,169.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    19,000.70 : 28,501.05 = 12,779.90 : x
  2. Step 2: Convert to fraction form
    19,000.70/28,501.05 = 12,779.90/x
  3. Step 3: Cross multiply
    19,000.70x = 28,501.05 × 12,779.90
  4. Step 4: Simplify right side
    19,000.70x = 364,240,568.90
  5. Step 5: Solve for x
    x = 364,240,568.90/19,000.70
  6. Step 6: Final answer
    x = 19,169.85

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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.