Home / 15,700.36-21,670.26-11,979.40

Finding the Fourth Proportional to 15,700.36, 21,670.26 and 11,979.40

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Solution

The fourth proportional to 15,700.36, 21,670.26 and 11,979.40 is: 16,534.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,700.36 : 21,670.26 = 11,979.40 : x
  2. Step 2: Convert to fraction form
    15,700.36/21,670.26 = 11,979.40/x
  3. Step 3: Cross multiply
    15,700.36x = 21,670.26 × 11,979.40
  4. Step 4: Simplify right side
    15,700.36x = 259,596,712.64
  5. Step 5: Solve for x
    x = 259,596,712.64/15,700.36
  6. Step 6: Final answer
    x = 16,534.44

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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.