Home / 20,779.40-31,169.10-19,353.80

Finding the Fourth Proportional to 20,779.40, 31,169.10 and 19,353.80

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Solution

The fourth proportional to 20,779.40, 31,169.10 and 19,353.80 is: 29,030.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,779.40 : 31,169.10 = 19,353.80 : x
  2. Step 2: Convert to fraction form
    20,779.40/31,169.10 = 19,353.80/x
  3. Step 3: Cross multiply
    20,779.40x = 31,169.10 × 19,353.80
  4. Step 4: Simplify right side
    20,779.40x = 603,240,527.58
  5. Step 5: Solve for x
    x = 603,240,527.58/20,779.40
  6. Step 6: Final answer
    x = 29,030.70

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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.