Home / 5,159.12-7,117.86-2,920.76

Finding the Fourth Proportional to 5,159.12, 7,117.86 and 2,920.76

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Solution

The fourth proportional to 5,159.12, 7,117.86 and 2,920.76 is: 4,029.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,159.12 : 7,117.86 = 2,920.76 : x
  2. Step 2: Convert to fraction form
    5,159.12/7,117.86 = 2,920.76/x
  3. Step 3: Cross multiply
    5,159.12x = 7,117.86 × 2,920.76
  4. Step 4: Simplify right side
    5,159.12x = 20,789,560.77
  5. Step 5: Solve for x
    x = 20,789,560.77/5,159.12
  6. Step 6: Final answer
    x = 4,029.67

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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.