Home / 2,988.45-4,115.19-2,147.67

Finding the Fourth Proportional to 2,988.45, 4,115.19 and 2,147.67

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Solution

The fourth proportional to 2,988.45, 4,115.19 and 2,147.67 is: 2,957.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,988.45 : 4,115.19 = 2,147.67 : x
  2. Step 2: Convert to fraction form
    2,988.45/4,115.19 = 2,147.67/x
  3. Step 3: Cross multiply
    2,988.45x = 4,115.19 × 2,147.67
  4. Step 4: Simplify right side
    2,988.45x = 8,838,070.11
  5. Step 5: Solve for x
    x = 8,838,070.11/2,988.45
  6. Step 6: Final answer
    x = 2,957.41

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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.