Home / 10,675.40-15,980.70-6,279.80

Finding the Fourth Proportional to 10,675.40, 15,980.70 and 6,279.80

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Solution

The fourth proportional to 10,675.40, 15,980.70 and 6,279.80 is: 9,400.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,675.40 : 15,980.70 = 6,279.80 : x
  2. Step 2: Convert to fraction form
    10,675.40/15,980.70 = 6,279.80/x
  3. Step 3: Cross multiply
    10,675.40x = 15,980.70 × 6,279.80
  4. Step 4: Simplify right side
    10,675.40x = 100,355,599.86
  5. Step 5: Solve for x
    x = 100,355,599.86/10,675.40
  6. Step 6: Final answer
    x = 9,400.64

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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.