Home / 20,687.50-28,548.55-11,256.06

Finding the Fourth Proportional to 20,687.50, 28,548.55 and 11,256.06

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Solution

The fourth proportional to 20,687.50, 28,548.55 and 11,256.06 is: 15,533.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,687.50 : 28,548.55 = 11,256.06 : x
  2. Step 2: Convert to fraction form
    20,687.50/28,548.55 = 11,256.06/x
  3. Step 3: Cross multiply
    20,687.50x = 28,548.55 × 11,256.06
  4. Step 4: Simplify right side
    20,687.50x = 321,344,312.84
  5. Step 5: Solve for x
    x = 321,344,312.84/20,687.50
  6. Step 6: Final answer
    x = 15,533.26

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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.