Home / 28,918.60-43,394.10-12,275.80

Finding the Fourth Proportional to 28,918.60, 43,394.10 and 12,275.80

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Solution

The fourth proportional to 28,918.60, 43,394.10 and 12,275.80 is: 18,420.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,918.60 : 43,394.10 = 12,275.80 : x
  2. Step 2: Convert to fraction form
    28,918.60/43,394.10 = 12,275.80/x
  3. Step 3: Cross multiply
    28,918.60x = 43,394.10 × 12,275.80
  4. Step 4: Simplify right side
    28,918.60x = 532,697,292.78
  5. Step 5: Solve for x
    x = 532,697,292.78/28,918.60
  6. Step 6: Final answer
    x = 18,420.58

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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.