Home / 13,489.41-20,134.23-12,658.35

Finding the Fourth Proportional to 13,489.41, 20,134.23 and 12,658.35

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Solution

The fourth proportional to 13,489.41, 20,134.23 and 12,658.35 is: 18,893.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,489.41 : 20,134.23 = 12,658.35 : x
  2. Step 2: Convert to fraction form
    13,489.41/20,134.23 = 12,658.35/x
  3. Step 3: Cross multiply
    13,489.41x = 20,134.23 × 12,658.35
  4. Step 4: Simplify right side
    13,489.41x = 254,866,130.32
  5. Step 5: Solve for x
    x = 254,866,130.32/13,489.41
  6. Step 6: Final answer
    x = 18,893.79

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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.