Home / 20,667.26-28,470.20-14,985.31

Finding the Fourth Proportional to 20,667.26, 28,470.20 and 14,985.31

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Solution

The fourth proportional to 20,667.26, 28,470.20 and 14,985.31 is: 20,643.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,667.26 : 28,470.20 = 14,985.31 : x
  2. Step 2: Convert to fraction form
    20,667.26/28,470.20 = 14,985.31/x
  3. Step 3: Cross multiply
    20,667.26x = 28,470.20 × 14,985.31
  4. Step 4: Simplify right side
    20,667.26x = 426,634,626.66
  5. Step 5: Solve for x
    x = 426,634,626.66/20,667.26
  6. Step 6: Final answer
    x = 20,643.02

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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.