Home / 25,507.56-35,221.67-21,280.78

Finding the Fourth Proportional to 25,507.56, 35,221.67 and 21,280.78

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Solution

The fourth proportional to 25,507.56, 35,221.67 and 21,280.78 is: 29,385.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,507.56 : 35,221.67 = 21,280.78 : x
  2. Step 2: Convert to fraction form
    25,507.56/35,221.67 = 21,280.78/x
  3. Step 3: Cross multiply
    25,507.56x = 35,221.67 × 21,280.78
  4. Step 4: Simplify right side
    25,507.56x = 749,544,610.50
  5. Step 5: Solve for x
    x = 749,544,610.50/25,507.56
  6. Step 6: Final answer
    x = 29,385.19

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Double scale
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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.