Home / 13,390.26-18,477.74-7,421.58

Finding the Fourth Proportional to 13,390.26, 18,477.74 and 7,421.58

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Solution

The fourth proportional to 13,390.26, 18,477.74 and 7,421.58 is: 10,241.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,390.26 : 18,477.74 = 7,421.58 : x
  2. Step 2: Convert to fraction form
    13,390.26/18,477.74 = 7,421.58/x
  3. Step 3: Cross multiply
    13,390.26x = 18,477.74 × 7,421.58
  4. Step 4: Simplify right side
    13,390.26x = 137,134,025.63
  5. Step 5: Solve for x
    x = 137,134,025.63/13,390.26
  6. Step 6: Final answer
    x = 10,241.33

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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.