Home / 21,587.75-29,780.57-13,928.94

Finding the Fourth Proportional to 21,587.75, 29,780.57 and 13,928.94

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Solution

The fourth proportional to 21,587.75, 29,780.57 and 13,928.94 is: 19,215.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,587.75 : 29,780.57 = 13,928.94 : x
  2. Step 2: Convert to fraction form
    21,587.75/29,780.57 = 13,928.94/x
  3. Step 3: Cross multiply
    21,587.75x = 29,780.57 × 13,928.94
  4. Step 4: Simplify right side
    21,587.75x = 414,811,703.05
  5. Step 5: Solve for x
    x = 414,811,703.05/21,587.75
  6. Step 6: Final answer
    x = 19,215.15

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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.