Home / 20,861.48-28,781.51-14,486.37

Finding the Fourth Proportional to 20,861.48, 28,781.51 and 14,486.37

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Solution

The fourth proportional to 20,861.48, 28,781.51 and 14,486.37 is: 19,986.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,861.48 : 28,781.51 = 14,486.37 : x
  2. Step 2: Convert to fraction form
    20,861.48/28,781.51 = 14,486.37/x
  3. Step 3: Cross multiply
    20,861.48x = 28,781.51 × 14,486.37
  4. Step 4: Simplify right side
    20,861.48x = 416,939,530.59
  5. Step 5: Solve for x
    x = 416,939,530.59/20,861.48
  6. Step 6: Final answer
    x = 19,986.10

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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.