Home / 20,643.36-28,499.64-13,590.29

Finding the Fourth Proportional to 20,643.36, 28,499.64 and 13,590.29

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Solution

The fourth proportional to 20,643.36, 28,499.64 and 13,590.29 is: 18,762.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.36 : 28,499.64 = 13,590.29 : x
  2. Step 2: Convert to fraction form
    20,643.36/28,499.64 = 13,590.29/x
  3. Step 3: Cross multiply
    20,643.36x = 28,499.64 × 13,590.29
  4. Step 4: Simplify right side
    20,643.36x = 387,318,230.00
  5. Step 5: Solve for x
    x = 387,318,230.00/20,643.36
  6. Step 6: Final answer
    x = 18,762.36

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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.