Home / 21,318.08-29,417.60-13,360

Finding the Fourth Proportional to 21,318.08, 29,417.60 and 13,360

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Solution

The fourth proportional to 21,318.08, 29,417.60 and 13,360 is: 18,435.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,318.08 : 29,417.60 = 13,360 : x
  2. Step 2: Convert to fraction form
    21,318.08/29,417.60 = 13,360/x
  3. Step 3: Cross multiply
    21,318.08x = 29,417.60 × 13,360
  4. Step 4: Simplify right side
    21,318.08x = 393,019,136
  5. Step 5: Solve for x
    x = 393,019,136/21,318.08
  6. Step 6: Final answer
    x = 18,435.95

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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.