Home / 21,390.84-29,519.54-11,830.22

Finding the Fourth Proportional to 21,390.84, 29,519.54 and 11,830.22

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Solution

The fourth proportional to 21,390.84, 29,519.54 and 11,830.22 is: 16,325.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,390.84 : 29,519.54 = 11,830.22 : x
  2. Step 2: Convert to fraction form
    21,390.84/29,519.54 = 11,830.22/x
  3. Step 3: Cross multiply
    21,390.84x = 29,519.54 × 11,830.22
  4. Step 4: Simplify right side
    21,390.84x = 349,222,652.50
  5. Step 5: Solve for x
    x = 349,222,652.50/21,390.84
  6. Step 6: Final answer
    x = 16,325.80

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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.