Home / 21,305.40-29,396.01-13,541.39

Finding the Fourth Proportional to 21,305.40, 29,396.01 and 13,541.39

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Solution

The fourth proportional to 21,305.40, 29,396.01 and 13,541.39 is: 18,683.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,305.40 : 29,396.01 = 13,541.39 : x
  2. Step 2: Convert to fraction form
    21,305.40/29,396.01 = 13,541.39/x
  3. Step 3: Cross multiply
    21,305.40x = 29,396.01 × 13,541.39
  4. Step 4: Simplify right side
    21,305.40x = 398,062,688.87
  5. Step 5: Solve for x
    x = 398,062,688.87/21,305.40
  6. Step 6: Final answer
    x = 18,683.65

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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.