Home / 7,715.80-11,565.60-4,421.80

Finding the Fourth Proportional to 7,715.80, 11,565.60 and 4,421.80

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Solution

The fourth proportional to 7,715.80, 11,565.60 and 4,421.80 is: 6,628.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,715.80 : 11,565.60 = 4,421.80 : x
  2. Step 2: Convert to fraction form
    7,715.80/11,565.60 = 4,421.80/x
  3. Step 3: Cross multiply
    7,715.80x = 11,565.60 × 4,421.80
  4. Step 4: Simplify right side
    7,715.80x = 51,140,770.08
  5. Step 5: Solve for x
    x = 51,140,770.08/7,715.80
  6. Step 6: Final answer
    x = 6,628.06

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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.