Home / 20,590.55-28,438.32-13,864.49

Finding the Fourth Proportional to 20,590.55, 28,438.32 and 13,864.49

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Solution

The fourth proportional to 20,590.55, 28,438.32 and 13,864.49 is: 19,148.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,590.55 : 28,438.32 = 13,864.49 : x
  2. Step 2: Convert to fraction form
    20,590.55/28,438.32 = 13,864.49/x
  3. Step 3: Cross multiply
    20,590.55x = 28,438.32 × 13,864.49
  4. Step 4: Simplify right side
    20,590.55x = 394,282,782.70
  5. Step 5: Solve for x
    x = 394,282,782.70/20,590.55
  6. Step 6: Final answer
    x = 19,148.72

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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.