Home / 28,289.85-39,017.46-18,219.12

Finding the Fourth Proportional to 28,289.85, 39,017.46 and 18,219.12

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Solution

The fourth proportional to 28,289.85, 39,017.46 and 18,219.12 is: 25,127.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,289.85 : 39,017.46 = 18,219.12 : x
  2. Step 2: Convert to fraction form
    28,289.85/39,017.46 = 18,219.12/x
  3. Step 3: Cross multiply
    28,289.85x = 39,017.46 × 18,219.12
  4. Step 4: Simplify right side
    28,289.85x = 710,863,785.84
  5. Step 5: Solve for x
    x = 710,863,785.84/28,289.85
  6. Step 6: Final answer
    x = 25,127.87

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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.