Home / 5,780.40-8,670.60-5,110.80

Finding the Fourth Proportional to 5,780.40, 8,670.60 and 5,110.80

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Solution

The fourth proportional to 5,780.40, 8,670.60 and 5,110.80 is: 7,666.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,780.40 : 8,670.60 = 5,110.80 : x
  2. Step 2: Convert to fraction form
    5,780.40/8,670.60 = 5,110.80/x
  3. Step 3: Cross multiply
    5,780.40x = 8,670.60 × 5,110.80
  4. Step 4: Simplify right side
    5,780.40x = 44,313,702.48
  5. Step 5: Solve for x
    x = 44,313,702.48/5,780.40
  6. Step 6: Final answer
    x = 7,666.20

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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.