Home / 20,686.57-28,547.44-11,255.07

Finding the Fourth Proportional to 20,686.57, 28,547.44 and 11,255.07

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Solution

The fourth proportional to 20,686.57, 28,547.44 and 11,255.07 is: 15,531.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.57 : 28,547.44 = 11,255.07 : x
  2. Step 2: Convert to fraction form
    20,686.57/28,547.44 = 11,255.07/x
  3. Step 3: Cross multiply
    20,686.57x = 28,547.44 × 11,255.07
  4. Step 4: Simplify right side
    20,686.57x = 321,303,435.52
  5. Step 5: Solve for x
    x = 321,303,435.52/20,686.57
  6. Step 6: Final answer
    x = 15,531.98

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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.