Home / 20,670.60-28,513.92-13,490.34

Finding the Fourth Proportional to 20,670.60, 28,513.92 and 13,490.34

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Solution

The fourth proportional to 20,670.60, 28,513.92 and 13,490.34 is: 18,609.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,670.60 : 28,513.92 = 13,490.34 : x
  2. Step 2: Convert to fraction form
    20,670.60/28,513.92 = 13,490.34/x
  3. Step 3: Cross multiply
    20,670.60x = 28,513.92 × 13,490.34
  4. Step 4: Simplify right side
    20,670.60x = 384,662,475.53
  5. Step 5: Solve for x
    x = 384,662,475.53/20,670.60
  6. Step 6: Final answer
    x = 18,609.16

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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.