Home / 20,528.82-28,319.76-12,971.52

Finding the Fourth Proportional to 20,528.82, 28,319.76 and 12,971.52

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Solution

The fourth proportional to 20,528.82, 28,319.76 and 12,971.52 is: 17,894.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,528.82 : 28,319.76 = 12,971.52 : x
  2. Step 2: Convert to fraction form
    20,528.82/28,319.76 = 12,971.52/x
  3. Step 3: Cross multiply
    20,528.82x = 28,319.76 × 12,971.52
  4. Step 4: Simplify right side
    20,528.82x = 367,350,333.24
  5. Step 5: Solve for x
    x = 367,350,333.24/20,528.82
  6. Step 6: Final answer
    x = 17,894.37

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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.