Home / 21,168.03-31,726.58-7,830.39

Finding the Fourth Proportional to 21,168.03, 31,726.58 and 7,830.39

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Solution

The fourth proportional to 21,168.03, 31,726.58 and 7,830.39 is: 11,736.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,168.03 : 31,726.58 = 7,830.39 : x
  2. Step 2: Convert to fraction form
    21,168.03/31,726.58 = 7,830.39/x
  3. Step 3: Cross multiply
    21,168.03x = 31,726.58 × 7,830.39
  4. Step 4: Simplify right side
    21,168.03x = 248,431,455.61
  5. Step 5: Solve for x
    x = 248,431,455.61/21,168.03
  6. Step 6: Final answer
    x = 11,736.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.