Home / 7,130.94-9,840.45-3,987.12

Finding the Fourth Proportional to 7,130.94, 9,840.45 and 3,987.12

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Solution

The fourth proportional to 7,130.94, 9,840.45 and 3,987.12 is: 5,502.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.94 : 9,840.45 = 3,987.12 : x
  2. Step 2: Convert to fraction form
    7,130.94/9,840.45 = 3,987.12/x
  3. Step 3: Cross multiply
    7,130.94x = 9,840.45 × 3,987.12
  4. Step 4: Simplify right side
    7,130.94x = 39,235,055.00
  5. Step 5: Solve for x
    x = 39,235,055.00/7,130.94
  6. Step 6: Final answer
    x = 5,502.09

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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.