Home / 13,977.90-20,808.36-13,903.98

Finding the Fourth Proportional to 13,977.90, 20,808.36 and 13,903.98

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Solution

The fourth proportional to 13,977.90, 20,808.36 and 13,903.98 is: 20,698.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,977.90 : 20,808.36 = 13,903.98 : x
  2. Step 2: Convert to fraction form
    13,977.90/20,808.36 = 13,903.98/x
  3. Step 3: Cross multiply
    13,977.90x = 20,808.36 × 13,903.98
  4. Step 4: Simplify right side
    13,977.90x = 289,319,021.27
  5. Step 5: Solve for x
    x = 289,319,021.27/13,977.90
  6. Step 6: Final answer
    x = 20,698.32

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.