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Finding the Fourth Proportional to 8,977.50, 12,389.77 and 5,251.50

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Solution

The fourth proportional to 8,977.50, 12,389.77 and 5,251.50 is: 7,247.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,977.50 : 12,389.77 = 5,251.50 : x
  2. Step 2: Convert to fraction form
    8,977.50/12,389.77 = 5,251.50/x
  3. Step 3: Cross multiply
    8,977.50x = 12,389.77 × 5,251.50
  4. Step 4: Simplify right side
    8,977.50x = 65,064,877.16
  5. Step 5: Solve for x
    x = 65,064,877.16/8,977.50
  6. Step 6: Final answer
    x = 7,247.55

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.