Home / 8,290.55-11,442.08-5,638.81

Finding the Fourth Proportional to 8,290.55, 11,442.08 and 5,638.81

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Solution

The fourth proportional to 8,290.55, 11,442.08 and 5,638.81 is: 7,782.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,290.55 : 11,442.08 = 5,638.81 : x
  2. Step 2: Convert to fraction form
    8,290.55/11,442.08 = 5,638.81/x
  3. Step 3: Cross multiply
    8,290.55x = 11,442.08 × 5,638.81
  4. Step 4: Simplify right side
    8,290.55x = 64,519,715.12
  5. Step 5: Solve for x
    x = 64,519,715.12/8,290.55
  6. Step 6: Final answer
    x = 7,782.32

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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.