Home / 20,602.50-28,431.45-11,171.07

Finding the Fourth Proportional to 20,602.50, 28,431.45 and 11,171.07

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Solution

The fourth proportional to 20,602.50, 28,431.45 and 11,171.07 is: 15,416.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.50 : 28,431.45 = 11,171.07 : x
  2. Step 2: Convert to fraction form
    20,602.50/28,431.45 = 11,171.07/x
  3. Step 3: Cross multiply
    20,602.50x = 28,431.45 × 11,171.07
  4. Step 4: Simplify right side
    20,602.50x = 317,609,718.15
  5. Step 5: Solve for x
    x = 317,609,718.15/20,602.50
  6. Step 6: Final answer
    x = 15,416.08

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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.