Home / 20,490.64-28,277.55-11,416.60

Finding the Fourth Proportional to 20,490.64, 28,277.55 and 11,416.60

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Solution

The fourth proportional to 20,490.64, 28,277.55 and 11,416.60 is: 15,755.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,490.64 : 28,277.55 = 11,416.60 : x
  2. Step 2: Convert to fraction form
    20,490.64/28,277.55 = 11,416.60/x
  3. Step 3: Cross multiply
    20,490.64x = 28,277.55 × 11,416.60
  4. Step 4: Simplify right side
    20,490.64x = 322,833,501.01
  5. Step 5: Solve for x
    x = 322,833,501.01/20,490.64
  6. Step 6: Final answer
    x = 15,755.17

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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.