Home / 20,602.32-28,431.76-12,639.82

Finding the Fourth Proportional to 20,602.32, 28,431.76 and 12,639.82

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Solution

The fourth proportional to 20,602.32, 28,431.76 and 12,639.82 is: 17,443.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,602.32 : 28,431.76 = 12,639.82 : x
  2. Step 2: Convert to fraction form
    20,602.32/28,431.76 = 12,639.82/x
  3. Step 3: Cross multiply
    20,602.32x = 28,431.76 × 12,639.82
  4. Step 4: Simplify right side
    20,602.32x = 359,372,328.68
  5. Step 5: Solve for x
    x = 359,372,328.68/20,602.32
  6. Step 6: Final answer
    x = 17,443.29

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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.