Home / 21,079.86-29,099.68-13,426.44

Finding the Fourth Proportional to 21,079.86, 29,099.68 and 13,426.44

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Solution

The fourth proportional to 21,079.86, 29,099.68 and 13,426.44 is: 18,534.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,079.86 : 29,099.68 = 13,426.44 : x
  2. Step 2: Convert to fraction form
    21,079.86/29,099.68 = 13,426.44/x
  3. Step 3: Cross multiply
    21,079.86x = 29,099.68 × 13,426.44
  4. Step 4: Simplify right side
    21,079.86x = 390,705,107.54
  5. Step 5: Solve for x
    x = 390,705,107.54/21,079.86
  6. Step 6: Final answer
    x = 18,534.52

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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.