Home / 21,888.74-30,199.43-12,939.26

Finding the Fourth Proportional to 21,888.74, 30,199.43 and 12,939.26

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Solution

The fourth proportional to 21,888.74, 30,199.43 and 12,939.26 is: 17,852.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,888.74 : 30,199.43 = 12,939.26 : x
  2. Step 2: Convert to fraction form
    21,888.74/30,199.43 = 12,939.26/x
  3. Step 3: Cross multiply
    21,888.74x = 30,199.43 × 12,939.26
  4. Step 4: Simplify right side
    21,888.74x = 390,758,060.93
  5. Step 5: Solve for x
    x = 390,758,060.93/21,888.74
  6. Step 6: Final answer
    x = 17,852.02

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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.