Home / 21,942.10-30,279.98-11,870.51

Finding the Fourth Proportional to 21,942.10, 30,279.98 and 11,870.51

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Solution

The fourth proportional to 21,942.10, 30,279.98 and 11,870.51 is: 16,381.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,942.10 : 30,279.98 = 11,870.51 : x
  2. Step 2: Convert to fraction form
    21,942.10/30,279.98 = 11,870.51/x
  3. Step 3: Cross multiply
    21,942.10x = 30,279.98 × 11,870.51
  4. Step 4: Simplify right side
    21,942.10x = 359,438,821.74
  5. Step 5: Solve for x
    x = 359,438,821.74/21,942.10
  6. Step 6: Final answer
    x = 16,381.24

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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.