Home / 45,918.60-68,877.90-12,643.80

Finding the Fourth Proportional to 45,918.60, 68,877.90 and 12,643.80

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Solution

The fourth proportional to 45,918.60, 68,877.90 and 12,643.80 is: 18,965.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,918.60 : 68,877.90 = 12,643.80 : x
  2. Step 2: Convert to fraction form
    45,918.60/68,877.90 = 12,643.80/x
  3. Step 3: Cross multiply
    45,918.60x = 68,877.90 × 12,643.80
  4. Step 4: Simplify right side
    45,918.60x = 870,878,392.02
  5. Step 5: Solve for x
    x = 870,878,392.02/45,918.60
  6. Step 6: Final answer
    x = 18,965.70

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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.