Home / 21,100.09-31,657.05-8,630.59

Finding the Fourth Proportional to 21,100.09, 31,657.05 and 8,630.59

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Solution

The fourth proportional to 21,100.09, 31,657.05 and 8,630.59 is: 12,948.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,100.09 : 31,657.05 = 8,630.59 : x
  2. Step 2: Convert to fraction form
    21,100.09/31,657.05 = 8,630.59/x
  3. Step 3: Cross multiply
    21,100.09x = 31,657.05 × 8,630.59
  4. Step 4: Simplify right side
    21,100.09x = 273,219,019.16
  5. Step 5: Solve for x
    x = 273,219,019.16/21,100.09
  6. Step 6: Final answer
    x = 12,948.71

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.