Home / 20,877.60-28,794.96-12,485.28

Finding the Fourth Proportional to 20,877.60, 28,794.96 and 12,485.28

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Solution

The fourth proportional to 20,877.60, 28,794.96 and 12,485.28 is: 17,220.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,877.60 : 28,794.96 = 12,485.28 : x
  2. Step 2: Convert to fraction form
    20,877.60/28,794.96 = 12,485.28/x
  3. Step 3: Cross multiply
    20,877.60x = 28,794.96 × 12,485.28
  4. Step 4: Simplify right side
    20,877.60x = 359,513,138.19
  5. Step 5: Solve for x
    x = 359,513,138.19/20,877.60
  6. Step 6: Final answer
    x = 17,220.04

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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.