Home / 8,317.12-12,485.40-5,407.60

Finding the Fourth Proportional to 8,317.12, 12,485.40 and 5,407.60

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Solution

The fourth proportional to 8,317.12, 12,485.40 and 5,407.60 is: 8,117.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,317.12 : 12,485.40 = 5,407.60 : x
  2. Step 2: Convert to fraction form
    8,317.12/12,485.40 = 5,407.60/x
  3. Step 3: Cross multiply
    8,317.12x = 12,485.40 × 5,407.60
  4. Step 4: Simplify right side
    8,317.12x = 67,516,049.04
  5. Step 5: Solve for x
    x = 67,516,049.04/8,317.12
  6. Step 6: Final answer
    x = 8,117.72

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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.