Home / 12,931.88-19,402.68-7,741.40

Finding the Fourth Proportional to 12,931.88, 19,402.68 and 7,741.40

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Solution

The fourth proportional to 12,931.88, 19,402.68 and 7,741.40 is: 11,615.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,931.88 : 19,402.68 = 7,741.40 : x
  2. Step 2: Convert to fraction form
    12,931.88/19,402.68 = 7,741.40/x
  3. Step 3: Cross multiply
    12,931.88x = 19,402.68 × 7,741.40
  4. Step 4: Simplify right side
    12,931.88x = 150,203,906.95
  5. Step 5: Solve for x
    x = 150,203,906.95/12,931.88
  6. Step 6: Final answer
    x = 11,615.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.