Home / 12,421.28-17,135.34-7,707.08

Finding the Fourth Proportional to 12,421.28, 17,135.34 and 7,707.08

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Solution

The fourth proportional to 12,421.28, 17,135.34 and 7,707.08 is: 10,632.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,421.28 : 17,135.34 = 7,707.08 : x
  2. Step 2: Convert to fraction form
    12,421.28/17,135.34 = 7,707.08/x
  3. Step 3: Cross multiply
    12,421.28x = 17,135.34 × 7,707.08
  4. Step 4: Simplify right side
    12,421.28x = 132,063,436.21
  5. Step 5: Solve for x
    x = 132,063,436.21/12,421.28
  6. Step 6: Final answer
    x = 10,632.03

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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.