Home / 9,138.80-13,710.98-3,871.06

Finding the Fourth Proportional to 9,138.80, 13,710.98 and 3,871.06

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Solution

The fourth proportional to 9,138.80, 13,710.98 and 3,871.06 is: 5,807.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,138.80 : 13,710.98 = 3,871.06 : x
  2. Step 2: Convert to fraction form
    9,138.80/13,710.98 = 3,871.06/x
  3. Step 3: Cross multiply
    9,138.80x = 13,710.98 × 3,871.06
  4. Step 4: Simplify right side
    9,138.80x = 53,076,026.24
  5. Step 5: Solve for x
    x = 53,076,026.24/9,138.80
  6. Step 6: Final answer
    x = 5,807.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.