Home / 20,398.58-28,146.30-13,693.94

Finding the Fourth Proportional to 20,398.58, 28,146.30 and 13,693.94

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Solution

The fourth proportional to 20,398.58, 28,146.30 and 13,693.94 is: 18,895.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,398.58 : 28,146.30 = 13,693.94 : x
  2. Step 2: Convert to fraction form
    20,398.58/28,146.30 = 13,693.94/x
  3. Step 3: Cross multiply
    20,398.58x = 28,146.30 × 13,693.94
  4. Step 4: Simplify right side
    20,398.58x = 385,433,743.42
  5. Step 5: Solve for x
    x = 385,433,743.42/20,398.58
  6. Step 6: Final answer
    x = 18,895.13

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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.