Home / 20,382.64-28,126.72-11,430.08

Finding the Fourth Proportional to 20,382.64, 28,126.72 and 11,430.08

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Solution

The fourth proportional to 20,382.64, 28,126.72 and 11,430.08 is: 15,772.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,382.64 : 28,126.72 = 11,430.08 : x
  2. Step 2: Convert to fraction form
    20,382.64/28,126.72 = 11,430.08/x
  3. Step 3: Cross multiply
    20,382.64x = 28,126.72 × 11,430.08
  4. Step 4: Simplify right side
    20,382.64x = 321,490,659.74
  5. Step 5: Solve for x
    x = 321,490,659.74/20,382.64
  6. Step 6: Final answer
    x = 15,772.77

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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.