Home / 12,421.80-17,140.41-7,384.19

Finding the Fourth Proportional to 12,421.80, 17,140.41 and 7,384.19

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Solution

The fourth proportional to 12,421.80, 17,140.41 and 7,384.19 is: 10,189.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.80 : 17,140.41 = 7,384.19 : x
  2. Step 2: Convert to fraction form
    12,421.80/17,140.41 = 7,384.19/x
  3. Step 3: Cross multiply
    12,421.80x = 17,140.41 × 7,384.19
  4. Step 4: Simplify right side
    12,421.80x = 126,567,958.42
  5. Step 5: Solve for x
    x = 126,567,958.42/12,421.80
  6. Step 6: Final answer
    x = 10,189.18

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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.