Home / 21,981.88-30,348.84-15,265.36

Finding the Fourth Proportional to 21,981.88, 30,348.84 and 15,265.36

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Solution

The fourth proportional to 21,981.88, 30,348.84 and 15,265.36 is: 21,075.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.88 : 30,348.84 = 15,265.36 : x
  2. Step 2: Convert to fraction form
    21,981.88/30,348.84 = 15,265.36/x
  3. Step 3: Cross multiply
    21,981.88x = 30,348.84 × 15,265.36
  4. Step 4: Simplify right side
    21,981.88x = 463,285,968.18
  5. Step 5: Solve for x
    x = 463,285,968.18/21,981.88
  6. Step 6: Final answer
    x = 21,075.81

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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.