Home / 20,853.49-28,779.03-11,903.87

Finding the Fourth Proportional to 20,853.49, 28,779.03 and 11,903.87

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Solution

The fourth proportional to 20,853.49, 28,779.03 and 11,903.87 is: 16,428.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,853.49 : 28,779.03 = 11,903.87 : x
  2. Step 2: Convert to fraction form
    20,853.49/28,779.03 = 11,903.87/x
  3. Step 3: Cross multiply
    20,853.49x = 28,779.03 × 11,903.87
  4. Step 4: Simplify right side
    20,853.49x = 342,581,831.85
  5. Step 5: Solve for x
    x = 342,581,831.85/20,853.49
  6. Step 6: Final answer
    x = 16,428.03

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.