Home / 21,378.58-29,501.77-11,817.90

Finding the Fourth Proportional to 21,378.58, 29,501.77 and 11,817.90

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Solution

The fourth proportional to 21,378.58, 29,501.77 and 11,817.90 is: 16,308.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,378.58 : 29,501.77 = 11,817.90 : x
  2. Step 2: Convert to fraction form
    21,378.58/29,501.77 = 11,817.90/x
  3. Step 3: Cross multiply
    21,378.58x = 29,501.77 × 11,817.90
  4. Step 4: Simplify right side
    21,378.58x = 348,648,967.68
  5. Step 5: Solve for x
    x = 348,648,967.68/21,378.58
  6. Step 6: Final answer
    x = 16,308.33

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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.