Home / 7,130.50-9,840.18-3,986.98

Finding the Fourth Proportional to 7,130.50, 9,840.18 and 3,986.98

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Solution

The fourth proportional to 7,130.50, 9,840.18 and 3,986.98 is: 5,502.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,130.50 : 9,840.18 = 3,986.98 : x
  2. Step 2: Convert to fraction form
    7,130.50/9,840.18 = 3,986.98/x
  3. Step 3: Cross multiply
    7,130.50x = 9,840.18 × 3,986.98
  4. Step 4: Simplify right side
    7,130.50x = 39,232,600.86
  5. Step 5: Solve for x
    x = 39,232,600.86/7,130.50
  6. Step 6: Final answer
    x = 5,502.08

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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.