Home / 20,643.54-28,499.90-13,590.47

Finding the Fourth Proportional to 20,643.54, 28,499.90 and 13,590.47

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Solution

The fourth proportional to 20,643.54, 28,499.90 and 13,590.47 is: 18,762.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.54 : 28,499.90 = 13,590.47 : x
  2. Step 2: Convert to fraction form
    20,643.54/28,499.90 = 13,590.47/x
  3. Step 3: Cross multiply
    20,643.54x = 28,499.90 × 13,590.47
  4. Step 4: Simplify right side
    20,643.54x = 387,327,035.95
  5. Step 5: Solve for x
    x = 387,327,035.95/20,643.54
  6. Step 6: Final answer
    x = 18,762.63

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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.