Home / 8,319.40-12,480.86-3,125.32

Finding the Fourth Proportional to 8,319.40, 12,480.86 and 3,125.32

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Solution

The fourth proportional to 8,319.40, 12,480.86 and 3,125.32 is: 4,688.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,319.40 : 12,480.86 = 3,125.32 : x
  2. Step 2: Convert to fraction form
    8,319.40/12,480.86 = 3,125.32/x
  3. Step 3: Cross multiply
    8,319.40x = 12,480.86 × 3,125.32
  4. Step 4: Simplify right side
    8,319.40x = 39,006,681.38
  5. Step 5: Solve for x
    x = 39,006,681.38/8,319.40
  6. Step 6: Final answer
    x = 4,688.64

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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.