Home / 21,380.33-29,504.65-11,820.47

Finding the Fourth Proportional to 21,380.33, 29,504.65 and 11,820.47

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Solution

The fourth proportional to 21,380.33, 29,504.65 and 11,820.47 is: 16,312.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,380.33 : 29,504.65 = 11,820.47 : x
  2. Step 2: Convert to fraction form
    21,380.33/29,504.65 = 11,820.47/x
  3. Step 3: Cross multiply
    21,380.33x = 29,504.65 × 11,820.47
  4. Step 4: Simplify right side
    21,380.33x = 348,758,830.19
  5. Step 5: Solve for x
    x = 348,758,830.19/21,380.33
  6. Step 6: Final answer
    x = 16,312.14

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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.