Home / 15,819.86-21,831.84-8,746.76

Finding the Fourth Proportional to 15,819.86, 21,831.84 and 8,746.76

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Solution

The fourth proportional to 15,819.86, 21,831.84 and 8,746.76 is: 12,070.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,819.86 : 21,831.84 = 8,746.76 : x
  2. Step 2: Convert to fraction form
    15,819.86/21,831.84 = 8,746.76/x
  3. Step 3: Cross multiply
    15,819.86x = 21,831.84 × 8,746.76
  4. Step 4: Simplify right side
    15,819.86x = 190,957,755.68
  5. Step 5: Solve for x
    x = 190,957,755.68/15,819.86
  6. Step 6: Final answer
    x = 12,070.77

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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.