Home / 8,315.40-12,478.08-3,316.89

Finding the Fourth Proportional to 8,315.40, 12,478.08 and 3,316.89

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Solution

The fourth proportional to 8,315.40, 12,478.08 and 3,316.89 is: 4,977.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,315.40 : 12,478.08 = 3,316.89 : x
  2. Step 2: Convert to fraction form
    8,315.40/12,478.08 = 3,316.89/x
  3. Step 3: Cross multiply
    8,315.40x = 12,478.08 × 3,316.89
  4. Step 4: Simplify right side
    8,315.40x = 41,388,418.77
  5. Step 5: Solve for x
    x = 41,388,418.77/8,315.40
  6. Step 6: Final answer
    x = 4,977.32

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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.