Home / 20,970.37-31,402.96-12,531.68

Finding the Fourth Proportional to 20,970.37, 31,402.96 and 12,531.68

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Solution

The fourth proportional to 20,970.37, 31,402.96 and 12,531.68 is: 18,766.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,970.37 : 31,402.96 = 12,531.68 : x
  2. Step 2: Convert to fraction form
    20,970.37/31,402.96 = 12,531.68/x
  3. Step 3: Cross multiply
    20,970.37x = 31,402.96 × 12,531.68
  4. Step 4: Simplify right side
    20,970.37x = 393,531,657.43
  5. Step 5: Solve for x
    x = 393,531,657.43/20,970.37
  6. Step 6: Final answer
    x = 18,766.08

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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.