Home / 20,686.55-28,547.57-11,255.18

Finding the Fourth Proportional to 20,686.55, 28,547.57 and 11,255.18

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Solution

The fourth proportional to 20,686.55, 28,547.57 and 11,255.18 is: 15,532.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,686.55 : 28,547.57 = 11,255.18 : x
  2. Step 2: Convert to fraction form
    20,686.55/28,547.57 = 11,255.18/x
  3. Step 3: Cross multiply
    20,686.55x = 28,547.57 × 11,255.18
  4. Step 4: Simplify right side
    20,686.55x = 321,308,054.01
  5. Step 5: Solve for x
    x = 321,308,054.01/20,686.55
  6. Step 6: Final answer
    x = 15,532.22

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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.