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Finding the Fourth Proportional to 39,776.80, 59,643.60 and 16,405.60

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Solution

The fourth proportional to 39,776.80, 59,643.60 and 16,405.60 is: 24,599.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,776.80 : 59,643.60 = 16,405.60 : x
  2. Step 2: Convert to fraction form
    39,776.80/59,643.60 = 16,405.60/x
  3. Step 3: Cross multiply
    39,776.80x = 59,643.60 × 16,405.60
  4. Step 4: Simplify right side
    39,776.80x = 978,489,044.16
  5. Step 5: Solve for x
    x = 978,489,044.16/39,776.80
  6. Step 6: Final answer
    x = 24,599.49

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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.