Home / 20,643.33-28,499.61-13,590.25

Finding the Fourth Proportional to 20,643.33, 28,499.61 and 13,590.25

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Solution

The fourth proportional to 20,643.33, 28,499.61 and 13,590.25 is: 18,762.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.33 : 28,499.61 = 13,590.25 : x
  2. Step 2: Convert to fraction form
    20,643.33/28,499.61 = 13,590.25/x
  3. Step 3: Cross multiply
    20,643.33x = 28,499.61 × 13,590.25
  4. Step 4: Simplify right side
    20,643.33x = 387,316,824.80
  5. Step 5: Solve for x
    x = 387,316,824.80/20,643.33
  6. Step 6: Final answer
    x = 18,762.32

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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.