Home / 5,117.19-7,678.74-2,155.41

Finding the Fourth Proportional to 5,117.19, 7,678.74 and 2,155.41

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Solution

The fourth proportional to 5,117.19, 7,678.74 and 2,155.41 is: 3,234.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,117.19 : 7,678.74 = 2,155.41 : x
  2. Step 2: Convert to fraction form
    5,117.19/7,678.74 = 2,155.41/x
  3. Step 3: Cross multiply
    5,117.19x = 7,678.74 × 2,155.41
  4. Step 4: Simplify right side
    5,117.19x = 16,550,783.81
  5. Step 5: Solve for x
    x = 16,550,783.81/5,117.19
  6. Step 6: Final answer
    x = 3,234.35

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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.