Home / 15,929.86-21,981.30-8,758.60

Finding the Fourth Proportional to 15,929.86, 21,981.30 and 8,758.60

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Solution

The fourth proportional to 15,929.86, 21,981.30 and 8,758.60 is: 12,085.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,929.86 : 21,981.30 = 8,758.60 : x
  2. Step 2: Convert to fraction form
    15,929.86/21,981.30 = 8,758.60/x
  3. Step 3: Cross multiply
    15,929.86x = 21,981.30 × 8,758.60
  4. Step 4: Simplify right side
    15,929.86x = 192,525,414.18
  5. Step 5: Solve for x
    x = 192,525,414.18/15,929.86
  6. Step 6: Final answer
    x = 12,085.82

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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.