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Finding the Fourth Proportional to 39,057.64, 53,899.76 and 21,152.68

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Solution

The fourth proportional to 39,057.64, 53,899.76 and 21,152.68 is: 29,190.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,057.64 : 53,899.76 = 21,152.68 : x
  2. Step 2: Convert to fraction form
    39,057.64/53,899.76 = 21,152.68/x
  3. Step 3: Cross multiply
    39,057.64x = 53,899.76 × 21,152.68
  4. Step 4: Simplify right side
    39,057.64x = 1,140,124,375.36
  5. Step 5: Solve for x
    x = 1,140,124,375.36/39,057.64
  6. Step 6: Final answer
    x = 29,190.82

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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.