Home / 20,643.12-28,487.70-12,258

Finding the Fourth Proportional to 20,643.12, 28,487.70 and 12,258

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Solution

The fourth proportional to 20,643.12, 28,487.70 and 12,258 is: 16,916.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,643.12 : 28,487.70 = 12,258 : x
  2. Step 2: Convert to fraction form
    20,643.12/28,487.70 = 12,258/x
  3. Step 3: Cross multiply
    20,643.12x = 28,487.70 × 12,258
  4. Step 4: Simplify right side
    20,643.12x = 349,202,226.60
  5. Step 5: Solve for x
    x = 349,202,226.60/20,643.12
  6. Step 6: Final answer
    x = 16,916.16

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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.