Home / 15,811.60-21,818.90-8,738.28

Finding the Fourth Proportional to 15,811.60, 21,818.90 and 8,738.28

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Solution

The fourth proportional to 15,811.60, 21,818.90 and 8,738.28 is: 12,058.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.60 : 21,818.90 = 8,738.28 : x
  2. Step 2: Convert to fraction form
    15,811.60/21,818.90 = 8,738.28/x
  3. Step 3: Cross multiply
    15,811.60x = 21,818.90 × 8,738.28
  4. Step 4: Simplify right side
    15,811.60x = 190,659,657.49
  5. Step 5: Solve for x
    x = 190,659,657.49/15,811.60
  6. Step 6: Final answer
    x = 12,058.21

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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.