Home / 20,686.88-28,547.89-11,255.51

Finding the Fourth Proportional to 20,686.88, 28,547.89 and 11,255.51

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Solution

The fourth proportional to 20,686.88, 28,547.89 and 11,255.51 is: 15,532.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.88 : 28,547.89 = 11,255.51 : x
  2. Step 2: Convert to fraction form
    20,686.88/28,547.89 = 11,255.51/x
  3. Step 3: Cross multiply
    20,686.88x = 28,547.89 × 11,255.51
  4. Step 4: Simplify right side
    20,686.88x = 321,321,061.37
  5. Step 5: Solve for x
    x = 321,321,061.37/20,686.88
  6. Step 6: Final answer
    x = 15,532.60

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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.