Home / 7,130.64-9,840.60-3,986.83

Finding the Fourth Proportional to 7,130.64, 9,840.60 and 3,986.83

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Solution

The fourth proportional to 7,130.64, 9,840.60 and 3,986.83 is: 5,502.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.64 : 9,840.60 = 3,986.83 : x
  2. Step 2: Convert to fraction form
    7,130.64/9,840.60 = 3,986.83/x
  3. Step 3: Cross multiply
    7,130.64x = 9,840.60 × 3,986.83
  4. Step 4: Simplify right side
    7,130.64x = 39,232,750.10
  5. Step 5: Solve for x
    x = 39,232,750.10/7,130.64
  6. Step 6: Final answer
    x = 5,502.00

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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.