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Finding the Fourth Proportional to 8,356.95, 12,515.64 and 7,255.32

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Solution

The fourth proportional to 8,356.95, 12,515.64 and 7,255.32 is: 10,865.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,356.95 : 12,515.64 = 7,255.32 : x
  2. Step 2: Convert to fraction form
    8,356.95/12,515.64 = 7,255.32/x
  3. Step 3: Cross multiply
    8,356.95x = 12,515.64 × 7,255.32
  4. Step 4: Simplify right side
    8,356.95x = 90,804,973.20
  5. Step 5: Solve for x
    x = 90,804,973.20/8,356.95
  6. Step 6: Final answer
    x = 10,865.80

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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.