Home / 14,085.20-21,127.80-13,278.80

Finding the Fourth Proportional to 14,085.20, 21,127.80 and 13,278.80

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Solution

The fourth proportional to 14,085.20, 21,127.80 and 13,278.80 is: 19,918.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,085.20 : 21,127.80 = 13,278.80 : x
  2. Step 2: Convert to fraction form
    14,085.20/21,127.80 = 13,278.80/x
  3. Step 3: Cross multiply
    14,085.20x = 21,127.80 × 13,278.80
  4. Step 4: Simplify right side
    14,085.20x = 280,551,830.64
  5. Step 5: Solve for x
    x = 280,551,830.64/14,085.20
  6. Step 6: Final answer
    x = 19,918.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.