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Finding the Fourth Proportional to 13,656.32, 20,486.16 and 4,892.16

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Solution

The fourth proportional to 13,656.32, 20,486.16 and 4,892.16 is: 7,338.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    13,656.32 : 20,486.16 = 4,892.16 : x
  2. Step 2: Convert to fraction form
    13,656.32/20,486.16 = 4,892.16/x
  3. Step 3: Cross multiply
    13,656.32x = 20,486.16 × 4,892.16
  4. Step 4: Simplify right side
    13,656.32x = 100,221,572.51
  5. Step 5: Solve for x
    x = 100,221,572.51/13,656.32
  6. Step 6: Final answer
    x = 7,338.84

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.