Home / 20,686.51-28,514.19-13,969.99

Finding the Fourth Proportional to 20,686.51, 28,514.19 and 13,969.99

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Solution

The fourth proportional to 20,686.51, 28,514.19 and 13,969.99 is: 19,256.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.51 : 28,514.19 = 13,969.99 : x
  2. Step 2: Convert to fraction form
    20,686.51/28,514.19 = 13,969.99/x
  3. Step 3: Cross multiply
    20,686.51x = 28,514.19 × 13,969.99
  4. Step 4: Simplify right side
    20,686.51x = 398,342,949.16
  5. Step 5: Solve for x
    x = 398,342,949.16/20,686.51
  6. Step 6: Final answer
    x = 19,256.17

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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.