Home / 21,981.24-30,329.64-13,024.80

Finding the Fourth Proportional to 21,981.24, 30,329.64 and 13,024.80

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Solution

The fourth proportional to 21,981.24, 30,329.64 and 13,024.80 is: 17,971.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,981.24 : 30,329.64 = 13,024.80 : x
  2. Step 2: Convert to fraction form
    21,981.24/30,329.64 = 13,024.80/x
  3. Step 3: Cross multiply
    21,981.24x = 30,329.64 × 13,024.80
  4. Step 4: Simplify right side
    21,981.24x = 395,037,495.07
  5. Step 5: Solve for x
    x = 395,037,495.07/21,981.24
  6. Step 6: Final answer
    x = 17,971.57

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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.