Home / 9,871.40-13,622.13-5,395.21

Finding the Fourth Proportional to 9,871.40, 13,622.13 and 5,395.21

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Solution

The fourth proportional to 9,871.40, 13,622.13 and 5,395.21 is: 7,445.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,871.40 : 13,622.13 = 5,395.21 : x
  2. Step 2: Convert to fraction form
    9,871.40/13,622.13 = 5,395.21/x
  3. Step 3: Cross multiply
    9,871.40x = 13,622.13 × 5,395.21
  4. Step 4: Simplify right side
    9,871.40x = 73,494,217.94
  5. Step 5: Solve for x
    x = 73,494,217.94/9,871.40
  6. Step 6: Final answer
    x = 7,445.16

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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.