Home / 21,076.47-29,086.36-12,123.95

Finding the Fourth Proportional to 21,076.47, 29,086.36 and 12,123.95

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Solution

The fourth proportional to 21,076.47, 29,086.36 and 12,123.95 is: 16,731.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,076.47 : 29,086.36 = 12,123.95 : x
  2. Step 2: Convert to fraction form
    21,076.47/29,086.36 = 12,123.95/x
  3. Step 3: Cross multiply
    21,076.47x = 29,086.36 × 12,123.95
  4. Step 4: Simplify right side
    21,076.47x = 352,641,398.58
  5. Step 5: Solve for x
    x = 352,641,398.58/21,076.47
  6. Step 6: Final answer
    x = 16,731.52

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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.