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Finding the Fourth Proportional to 39,378.80, 59,062.80 and 13,080.80

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Solution

The fourth proportional to 39,378.80, 59,062.80 and 13,080.80 is: 19,619.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,378.80 : 59,062.80 = 13,080.80 : x
  2. Step 2: Convert to fraction form
    39,378.80/59,062.80 = 13,080.80/x
  3. Step 3: Cross multiply
    39,378.80x = 59,062.80 × 13,080.80
  4. Step 4: Simplify right side
    39,378.80x = 772,588,674.24
  5. Step 5: Solve for x
    x = 772,588,674.24/39,378.80
  6. Step 6: Final answer
    x = 19,619.41

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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.