Home / 14,395.21-19,870.36-8,428.79

Finding the Fourth Proportional to 14,395.21, 19,870.36 and 8,428.79

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Solution

The fourth proportional to 14,395.21, 19,870.36 and 8,428.79 is: 11,634.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,395.21 : 19,870.36 = 8,428.79 : x
  2. Step 2: Convert to fraction form
    14,395.21/19,870.36 = 8,428.79/x
  3. Step 3: Cross multiply
    14,395.21x = 19,870.36 × 8,428.79
  4. Step 4: Simplify right side
    14,395.21x = 167,483,120.27
  5. Step 5: Solve for x
    x = 167,483,120.27/14,395.21
  6. Step 6: Final answer
    x = 11,634.64

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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.