Home / 10,615.20-15,903.60-8,656.80

Finding the Fourth Proportional to 10,615.20, 15,903.60 and 8,656.80

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Solution

The fourth proportional to 10,615.20, 15,903.60 and 8,656.80 is: 12,969.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,615.20 : 15,903.60 = 8,656.80 : x
  2. Step 2: Convert to fraction form
    10,615.20/15,903.60 = 8,656.80/x
  3. Step 3: Cross multiply
    10,615.20x = 15,903.60 × 8,656.80
  4. Step 4: Simplify right side
    10,615.20x = 137,674,284.48
  5. Step 5: Solve for x
    x = 137,674,284.48/10,615.20
  6. Step 6: Final answer
    x = 12,969.54

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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.