Home / 5,145.90-7,124.67-4,886.70

Finding the Fourth Proportional to 5,145.90, 7,124.67 and 4,886.70

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Solution

The fourth proportional to 5,145.90, 7,124.67 and 4,886.70 is: 6,765.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,145.90 : 7,124.67 = 4,886.70 : x
  2. Step 2: Convert to fraction form
    5,145.90/7,124.67 = 4,886.70/x
  3. Step 3: Cross multiply
    5,145.90x = 7,124.67 × 4,886.70
  4. Step 4: Simplify right side
    5,145.90x = 34,816,124.89
  5. Step 5: Solve for x
    x = 34,816,124.89/5,145.90
  6. Step 6: Final answer
    x = 6,765.80

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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.