Home / 5,638.08-7,779.24-4,890.72

Finding the Fourth Proportional to 5,638.08, 7,779.24 and 4,890.72

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Solution

The fourth proportional to 5,638.08, 7,779.24 and 4,890.72 is: 6,748.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,638.08 : 7,779.24 = 4,890.72 : x
  2. Step 2: Convert to fraction form
    5,638.08/7,779.24 = 4,890.72/x
  3. Step 3: Cross multiply
    5,638.08x = 7,779.24 × 4,890.72
  4. Step 4: Simplify right side
    5,638.08x = 38,046,084.65
  5. Step 5: Solve for x
    x = 38,046,084.65/5,638.08
  6. Step 6: Final answer
    x = 6,748.06

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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.