Home / 21,985.04-30,339.31-11,913.75

Finding the Fourth Proportional to 21,985.04, 30,339.31 and 11,913.75

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Solution

The fourth proportional to 21,985.04, 30,339.31 and 11,913.75 is: 16,440.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,985.04 : 30,339.31 = 11,913.75 : x
  2. Step 2: Convert to fraction form
    21,985.04/30,339.31 = 11,913.75/x
  3. Step 3: Cross multiply
    21,985.04x = 30,339.31 × 11,913.75
  4. Step 4: Simplify right side
    21,985.04x = 361,454,894.94
  5. Step 5: Solve for x
    x = 361,454,894.94/21,985.04
  6. Step 6: Final answer
    x = 16,440.95

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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.