Home / 20,881.02-28,808.76-11,922.12

Finding the Fourth Proportional to 20,881.02, 28,808.76 and 11,922.12

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Solution

The fourth proportional to 20,881.02, 28,808.76 and 11,922.12 is: 16,448.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,881.02 : 28,808.76 = 11,922.12 : x
  2. Step 2: Convert to fraction form
    20,881.02/28,808.76 = 11,922.12/x
  3. Step 3: Cross multiply
    20,881.02x = 28,808.76 × 11,922.12
  4. Step 4: Simplify right side
    20,881.02x = 343,461,493.77
  5. Step 5: Solve for x
    x = 343,461,493.77/20,881.02
  6. Step 6: Final answer
    x = 16,448.50

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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.