Home / 12,928.76-19,393.26-8,315

Finding the Fourth Proportional to 12,928.76, 19,393.26 and 8,315

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Solution

The fourth proportional to 12,928.76, 19,393.26 and 8,315 is: 12,472.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,928.76 : 19,393.26 = 8,315 : x
  2. Step 2: Convert to fraction form
    12,928.76/19,393.26 = 8,315/x
  3. Step 3: Cross multiply
    12,928.76x = 19,393.26 × 8,315
  4. Step 4: Simplify right side
    12,928.76x = 161,254,956.90
  5. Step 5: Solve for x
    x = 161,254,956.90/12,928.76
  6. Step 6: Final answer
    x = 12,472.58

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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.