Home / 20,643.11-28,499.30-13,590.03

Finding the Fourth Proportional to 20,643.11, 28,499.30 and 13,590.03

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Solution

The fourth proportional to 20,643.11, 28,499.30 and 13,590.03 is: 18,762.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.11 : 28,499.30 = 13,590.03 : x
  2. Step 2: Convert to fraction form
    20,643.11/28,499.30 = 13,590.03/x
  3. Step 3: Cross multiply
    20,643.11x = 28,499.30 × 13,590.03
  4. Step 4: Simplify right side
    20,643.11x = 387,306,341.98
  5. Step 5: Solve for x
    x = 387,306,341.98/20,643.11
  6. Step 6: Final answer
    x = 18,762.02

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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.