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Finding the Fourth Proportional to 7,808.34, 10,779.40 and 5,303.64

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Solution

The fourth proportional to 7,808.34, 10,779.40 and 5,303.64 is: 7,321.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,808.34 : 10,779.40 = 5,303.64 : x
  2. Step 2: Convert to fraction form
    7,808.34/10,779.40 = 5,303.64/x
  3. Step 3: Cross multiply
    7,808.34x = 10,779.40 × 5,303.64
  4. Step 4: Simplify right side
    7,808.34x = 57,170,057.02
  5. Step 5: Solve for x
    x = 57,170,057.02/7,808.34
  6. Step 6: Final answer
    x = 7,321.67

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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.