Home / 20,937.26-28,892.47-12,980.23

Finding the Fourth Proportional to 20,937.26, 28,892.47 and 12,980.23

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Solution

The fourth proportional to 20,937.26, 28,892.47 and 12,980.23 is: 17,912.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,937.26 : 28,892.47 = 12,980.23 : x
  2. Step 2: Convert to fraction form
    20,937.26/28,892.47 = 12,980.23/x
  3. Step 3: Cross multiply
    20,937.26x = 28,892.47 × 12,980.23
  4. Step 4: Simplify right side
    20,937.26x = 375,030,801.19
  5. Step 5: Solve for x
    x = 375,030,801.19/20,937.26
  6. Step 6: Final answer
    x = 17,912.12

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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.