Home / 20,687.56-28,547.98-11,256.16

Finding the Fourth Proportional to 20,687.56, 28,547.98 and 11,256.16

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Solution

The fourth proportional to 20,687.56, 28,547.98 and 11,256.16 is: 15,533.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.56 : 28,547.98 = 11,256.16 : x
  2. Step 2: Convert to fraction form
    20,687.56/28,547.98 = 11,256.16/x
  3. Step 3: Cross multiply
    20,687.56x = 28,547.98 × 11,256.16
  4. Step 4: Simplify right side
    20,687.56x = 321,340,630.56
  5. Step 5: Solve for x
    x = 321,340,630.56/20,687.56
  6. Step 6: Final answer
    x = 15,533.04

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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.