Home / 13,515.80-20,273.70-7,683.80

Finding the Fourth Proportional to 13,515.80, 20,273.70 and 7,683.80

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Solution

The fourth proportional to 13,515.80, 20,273.70 and 7,683.80 is: 11,525.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,515.80 : 20,273.70 = 7,683.80 : x
  2. Step 2: Convert to fraction form
    13,515.80/20,273.70 = 7,683.80/x
  3. Step 3: Cross multiply
    13,515.80x = 20,273.70 × 7,683.80
  4. Step 4: Simplify right side
    13,515.80x = 155,779,056.06
  5. Step 5: Solve for x
    x = 155,779,056.06/13,515.80
  6. Step 6: Final answer
    x = 11,525.70

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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.