Home / 5,188.12-7,159.68-2,830.40

Finding the Fourth Proportional to 5,188.12, 7,159.68 and 2,830.40

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Solution

The fourth proportional to 5,188.12, 7,159.68 and 2,830.40 is: 3,905.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,188.12 : 7,159.68 = 2,830.40 : x
  2. Step 2: Convert to fraction form
    5,188.12/7,159.68 = 2,830.40/x
  3. Step 3: Cross multiply
    5,188.12x = 7,159.68 × 2,830.40
  4. Step 4: Simplify right side
    5,188.12x = 20,264,758.27
  5. Step 5: Solve for x
    x = 20,264,758.27/5,188.12
  6. Step 6: Final answer
    x = 3,905.99

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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.