Home / 13,421.54-18,521.10-7,453.59

Finding the Fourth Proportional to 13,421.54, 18,521.10 and 7,453.59

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Solution

The fourth proportional to 13,421.54, 18,521.10 and 7,453.59 is: 10,285.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,421.54 : 18,521.10 = 7,453.59 : x
  2. Step 2: Convert to fraction form
    13,421.54/18,521.10 = 7,453.59/x
  3. Step 3: Cross multiply
    13,421.54x = 18,521.10 × 7,453.59
  4. Step 4: Simplify right side
    13,421.54x = 138,048,685.75
  5. Step 5: Solve for x
    x = 138,048,685.75/13,421.54
  6. Step 6: Final answer
    x = 10,285.61

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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.