Home / 21,985.17-30,339.57-11,913.61

Finding the Fourth Proportional to 21,985.17, 30,339.57 and 11,913.61

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Solution

The fourth proportional to 21,985.17, 30,339.57 and 11,913.61 is: 16,440.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.17 : 30,339.57 = 11,913.61 : x
  2. Step 2: Convert to fraction form
    21,985.17/30,339.57 = 11,913.61/x
  3. Step 3: Cross multiply
    21,985.17x = 30,339.57 × 11,913.61
  4. Step 4: Simplify right side
    21,985.17x = 361,453,804.55
  5. Step 5: Solve for x
    x = 361,453,804.55/21,985.17
  6. Step 6: Final answer
    x = 16,440.80

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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.