Home / 21,327.60-31,991.40-14,329.20

Finding the Fourth Proportional to 21,327.60, 31,991.40 and 14,329.20

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Solution

The fourth proportional to 21,327.60, 31,991.40 and 14,329.20 is: 21,493.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,327.60 : 31,991.40 = 14,329.20 : x
  2. Step 2: Convert to fraction form
    21,327.60/31,991.40 = 14,329.20/x
  3. Step 3: Cross multiply
    21,327.60x = 31,991.40 × 14,329.20
  4. Step 4: Simplify right side
    21,327.60x = 458,411,168.88
  5. Step 5: Solve for x
    x = 458,411,168.88/21,327.60
  6. Step 6: Final answer
    x = 21,493.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.