Home / 20,409.51-28,157.88-13,340.01

Finding the Fourth Proportional to 20,409.51, 28,157.88 and 13,340.01

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Solution

The fourth proportional to 20,409.51, 28,157.88 and 13,340.01 is: 18,404.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,409.51 : 28,157.88 = 13,340.01 : x
  2. Step 2: Convert to fraction form
    20,409.51/28,157.88 = 13,340.01/x
  3. Step 3: Cross multiply
    20,409.51x = 28,157.88 × 13,340.01
  4. Step 4: Simplify right side
    20,409.51x = 375,626,400.78
  5. Step 5: Solve for x
    x = 375,626,400.78/20,409.51
  6. Step 6: Final answer
    x = 18,404.48

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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.