Home / 20,687.07-28,547.60-11,255.43

Finding the Fourth Proportional to 20,687.07, 28,547.60 and 11,255.43

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Solution

The fourth proportional to 20,687.07, 28,547.60 and 11,255.43 is: 15,532.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.07 : 28,547.60 = 11,255.43 : x
  2. Step 2: Convert to fraction form
    20,687.07/28,547.60 = 11,255.43/x
  3. Step 3: Cross multiply
    20,687.07x = 28,547.60 × 11,255.43
  4. Step 4: Simplify right side
    20,687.07x = 321,315,457.19
  5. Step 5: Solve for x
    x = 321,315,457.19/20,687.07
  6. Step 6: Final answer
    x = 15,532.19

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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.