Home / 12,878.46-17,788.95-10,649.34

Finding the Fourth Proportional to 12,878.46, 17,788.95 and 10,649.34

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Solution

The fourth proportional to 12,878.46, 17,788.95 and 10,649.34 is: 14,709.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,878.46 : 17,788.95 = 10,649.34 : x
  2. Step 2: Convert to fraction form
    12,878.46/17,788.95 = 10,649.34/x
  3. Step 3: Cross multiply
    12,878.46x = 17,788.95 × 10,649.34
  4. Step 4: Simplify right side
    12,878.46x = 189,440,576.79
  5. Step 5: Solve for x
    x = 189,440,576.79/12,878.46
  6. Step 6: Final answer
    x = 14,709.88

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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.