Home / 21,018.39-31,527.57-7,876.95

Finding the Fourth Proportional to 21,018.39, 31,527.57 and 7,876.95

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Solution

The fourth proportional to 21,018.39, 31,527.57 and 7,876.95 is: 11,815.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,018.39 : 31,527.57 = 7,876.95 : x
  2. Step 2: Convert to fraction form
    21,018.39/31,527.57 = 7,876.95/x
  3. Step 3: Cross multiply
    21,018.39x = 31,527.57 × 7,876.95
  4. Step 4: Simplify right side
    21,018.39x = 248,341,092.51
  5. Step 5: Solve for x
    x = 248,341,092.51/21,018.39
  6. Step 6: Final answer
    x = 11,815.42

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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.