Home / 21,420.09-32,140.94-12,070.53

Finding the Fourth Proportional to 21,420.09, 32,140.94 and 12,070.53

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Solution

The fourth proportional to 21,420.09, 32,140.94 and 12,070.53 is: 18,111.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,420.09 : 32,140.94 = 12,070.53 : x
  2. Step 2: Convert to fraction form
    21,420.09/32,140.94 = 12,070.53/x
  3. Step 3: Cross multiply
    21,420.09x = 32,140.94 × 12,070.53
  4. Step 4: Simplify right side
    21,420.09x = 387,958,120.15
  5. Step 5: Solve for x
    x = 387,958,120.15/21,420.09
  6. Step 6: Final answer
    x = 18,111.88

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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.