Home / 20,643.08-28,499.27-13,590

Finding the Fourth Proportional to 20,643.08, 28,499.27 and 13,590

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Solution

The fourth proportional to 20,643.08, 28,499.27 and 13,590 is: 18,761.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.08 : 28,499.27 = 13,590 : x
  2. Step 2: Convert to fraction form
    20,643.08/28,499.27 = 13,590/x
  3. Step 3: Cross multiply
    20,643.08x = 28,499.27 × 13,590
  4. Step 4: Simplify right side
    20,643.08x = 387,305,011.35
  5. Step 5: Solve for x
    x = 387,305,011.35/20,643.08
  6. Step 6: Final answer
    x = 18,761.98

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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.