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Finding the Fourth Proportional to 39,376.80, 59,070.60 and 13,078.80

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Solution

The fourth proportional to 39,376.80, 59,070.60 and 13,078.80 is: 19,619.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    39,376.80 : 59,070.60 = 13,078.80 : x
  2. Step 2: Convert to fraction form
    39,376.80/59,070.60 = 13,078.80/x
  3. Step 3: Cross multiply
    39,376.80x = 59,070.60 × 13,078.80
  4. Step 4: Simplify right side
    39,376.80x = 772,572,563.28
  5. Step 5: Solve for x
    x = 772,572,563.28/39,376.80
  6. Step 6: Final answer
    x = 19,619.99

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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.