Home / 13,460.88-20,312.76-12,972.72

Finding the Fourth Proportional to 13,460.88, 20,312.76 and 12,972.72

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Solution

The fourth proportional to 13,460.88, 20,312.76 and 12,972.72 is: 19,576.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,460.88 : 20,312.76 = 12,972.72 : x
  2. Step 2: Convert to fraction form
    13,460.88/20,312.76 = 12,972.72/x
  3. Step 3: Cross multiply
    13,460.88x = 20,312.76 × 12,972.72
  4. Step 4: Simplify right side
    13,460.88x = 263,511,747.91
  5. Step 5: Solve for x
    x = 263,511,747.91/13,460.88
  6. Step 6: Final answer
    x = 19,576.12

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.