Home / 12,499.20-18,748.80-10,310.40

Finding the Fourth Proportional to 12,499.20, 18,748.80 and 10,310.40

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Solution

The fourth proportional to 12,499.20, 18,748.80 and 10,310.40 is: 15,465.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,499.20 : 18,748.80 = 10,310.40 : x
  2. Step 2: Convert to fraction form
    12,499.20/18,748.80 = 10,310.40/x
  3. Step 3: Cross multiply
    12,499.20x = 18,748.80 × 10,310.40
  4. Step 4: Simplify right side
    12,499.20x = 193,307,627.52
  5. Step 5: Solve for x
    x = 193,307,627.52/12,499.20
  6. Step 6: Final answer
    x = 15,465.60

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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.