Home / 20,430.01-28,194.62-15,385.33

Finding the Fourth Proportional to 20,430.01, 28,194.62 and 15,385.33

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Solution

The fourth proportional to 20,430.01, 28,194.62 and 15,385.33 is: 21,232.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,430.01 : 28,194.62 = 15,385.33 : x
  2. Step 2: Convert to fraction form
    20,430.01/28,194.62 = 15,385.33/x
  3. Step 3: Cross multiply
    20,430.01x = 28,194.62 × 15,385.33
  4. Step 4: Simplify right side
    20,430.01x = 433,783,385.51
  5. Step 5: Solve for x
    x = 433,783,385.51/20,430.01
  6. Step 6: Final answer
    x = 21,232.66

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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.