Home / 21,780.90-30,037.84-14,224.82

Finding the Fourth Proportional to 21,780.90, 30,037.84 and 14,224.82

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Solution

The fourth proportional to 21,780.90, 30,037.84 and 14,224.82 is: 19,617.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,780.90 : 30,037.84 = 14,224.82 : x
  2. Step 2: Convert to fraction form
    21,780.90/30,037.84 = 14,224.82/x
  3. Step 3: Cross multiply
    21,780.90x = 30,037.84 × 14,224.82
  4. Step 4: Simplify right side
    21,780.90x = 427,282,681.44
  5. Step 5: Solve for x
    x = 427,282,681.44/21,780.90
  6. Step 6: Final answer
    x = 19,617.31

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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.