Home / 18,421.42-25,419.13-10,355.62

Finding the Fourth Proportional to 18,421.42, 25,419.13 and 10,355.62

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Solution

The fourth proportional to 18,421.42, 25,419.13 and 10,355.62 is: 14,289.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    18,421.42 : 25,419.13 = 10,355.62 : x
  2. Step 2: Convert to fraction form
    18,421.42/25,419.13 = 10,355.62/x
  3. Step 3: Cross multiply
    18,421.42x = 25,419.13 × 10,355.62
  4. Step 4: Simplify right side
    18,421.42x = 263,230,851.01
  5. Step 5: Solve for x
    x = 263,230,851.01/18,421.42
  6. Step 6: Final answer
    x = 14,289.39

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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.