Home / 15,811.79-21,820.05-8,738.33

Finding the Fourth Proportional to 15,811.79, 21,820.05 and 8,738.33

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Solution

The fourth proportional to 15,811.79, 21,820.05 and 8,738.33 is: 12,058.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,811.79 : 21,820.05 = 8,738.33 : x
  2. Step 2: Convert to fraction form
    15,811.79/21,820.05 = 8,738.33/x
  3. Step 3: Cross multiply
    15,811.79x = 21,820.05 × 8,738.33
  4. Step 4: Simplify right side
    15,811.79x = 190,670,688.42
  5. Step 5: Solve for x
    x = 190,670,688.42/15,811.79
  6. Step 6: Final answer
    x = 12,058.77

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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.