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Finding the Fourth Proportional to 40,578.40, 60,856.80 and 12,498.40

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Solution

The fourth proportional to 40,578.40, 60,856.80 and 12,498.40 is: 18,744.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,578.40 : 60,856.80 = 12,498.40 : x
  2. Step 2: Convert to fraction form
    40,578.40/60,856.80 = 12,498.40/x
  3. Step 3: Cross multiply
    40,578.40x = 60,856.80 × 12,498.40
  4. Step 4: Simplify right side
    40,578.40x = 760,612,629.12
  5. Step 5: Solve for x
    x = 760,612,629.12/40,578.40
  6. Step 6: Final answer
    x = 18,744.27

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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.