Home / 7,130.90-9,840.99-4,147.07

Finding the Fourth Proportional to 7,130.90, 9,840.99 and 4,147.07

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Solution

The fourth proportional to 7,130.90, 9,840.99 and 4,147.07 is: 5,723.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.90 : 9,840.99 = 4,147.07 : x
  2. Step 2: Convert to fraction form
    7,130.90/9,840.99 = 4,147.07/x
  3. Step 3: Cross multiply
    7,130.90x = 9,840.99 × 4,147.07
  4. Step 4: Simplify right side
    7,130.90x = 40,811,240.75
  5. Step 5: Solve for x
    x = 40,811,240.75/7,130.90
  6. Step 6: Final answer
    x = 5,723.15

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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.