Home / 21,158.39-29,193.41-12,656.79

Finding the Fourth Proportional to 21,158.39, 29,193.41 and 12,656.79

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Solution

The fourth proportional to 21,158.39, 29,193.41 and 12,656.79 is: 17,463.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,158.39 : 29,193.41 = 12,656.79 : x
  2. Step 2: Convert to fraction form
    21,158.39/29,193.41 = 12,656.79/x
  3. Step 3: Cross multiply
    21,158.39x = 29,193.41 × 12,656.79
  4. Step 4: Simplify right side
    21,158.39x = 369,494,891.40
  5. Step 5: Solve for x
    x = 369,494,891.40/21,158.39
  6. Step 6: Final answer
    x = 17,463.28

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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.