Home / 20,530.04-28,335.85-12,971.57

Finding the Fourth Proportional to 20,530.04, 28,335.85 and 12,971.57

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Solution

The fourth proportional to 20,530.04, 28,335.85 and 12,971.57 is: 17,903.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,530.04 : 28,335.85 = 12,971.57 : x
  2. Step 2: Convert to fraction form
    20,530.04/28,335.85 = 12,971.57/x
  3. Step 3: Cross multiply
    20,530.04x = 28,335.85 × 12,971.57
  4. Step 4: Simplify right side
    20,530.04x = 367,560,287.68
  5. Step 5: Solve for x
    x = 367,560,287.68/20,530.04
  6. Step 6: Final answer
    x = 17,903.54

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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.