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Finding the Fourth Proportional to 8,756.40, 12,085.02 and 5,219.40

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Solution

The fourth proportional to 8,756.40, 12,085.02 and 5,219.40 is: 7,203.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,756.40 : 12,085.02 = 5,219.40 : x
  2. Step 2: Convert to fraction form
    8,756.40/12,085.02 = 5,219.40/x
  3. Step 3: Cross multiply
    8,756.40x = 12,085.02 × 5,219.40
  4. Step 4: Simplify right side
    8,756.40x = 63,076,553.39
  5. Step 5: Solve for x
    x = 63,076,553.39/8,756.40
  6. Step 6: Final answer
    x = 7,203.48

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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.