Home / 15,729.21-21,698.15-12,748.41

Finding the Fourth Proportional to 15,729.21, 21,698.15 and 12,748.41

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Solution

The fourth proportional to 15,729.21, 21,698.15 and 12,748.41 is: 17,586.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,729.21 : 21,698.15 = 12,748.41 : x
  2. Step 2: Convert to fraction form
    15,729.21/21,698.15 = 12,748.41/x
  3. Step 3: Cross multiply
    15,729.21x = 21,698.15 × 12,748.41
  4. Step 4: Simplify right side
    15,729.21x = 276,616,848.70
  5. Step 5: Solve for x
    x = 276,616,848.70/15,729.21
  6. Step 6: Final answer
    x = 17,586.19

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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.