Home / 13,890.99-20,810.32-6,862.78

Finding the Fourth Proportional to 13,890.99, 20,810.32 and 6,862.78

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Solution

The fourth proportional to 13,890.99, 20,810.32 and 6,862.78 is: 10,281.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,890.99 : 20,810.32 = 6,862.78 : x
  2. Step 2: Convert to fraction form
    13,890.99/20,810.32 = 6,862.78/x
  3. Step 3: Cross multiply
    13,890.99x = 20,810.32 × 6,862.78
  4. Step 4: Simplify right side
    13,890.99x = 142,816,539.69
  5. Step 5: Solve for x
    x = 142,816,539.69/13,890.99
  6. Step 6: Final answer
    x = 10,281.23

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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.