Home / 21,823.50-30,115.01-12,868.95

Finding the Fourth Proportional to 21,823.50, 30,115.01 and 12,868.95

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Solution

The fourth proportional to 21,823.50, 30,115.01 and 12,868.95 is: 17,758.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,823.50 : 30,115.01 = 12,868.95 : x
  2. Step 2: Convert to fraction form
    21,823.50/30,115.01 = 12,868.95/x
  3. Step 3: Cross multiply
    21,823.50x = 30,115.01 × 12,868.95
  4. Step 4: Simplify right side
    21,823.50x = 387,548,590.11
  5. Step 5: Solve for x
    x = 387,548,590.11/21,823.50
  6. Step 6: Final answer
    x = 17,758.32

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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.