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Finding the Fourth Proportional to 10,642.63, 15,963.95 and 4,395.78

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Solution

The fourth proportional to 10,642.63, 15,963.95 and 4,395.78 is: 6,593.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,642.63 : 15,963.95 = 4,395.78 : x
  2. Step 2: Convert to fraction form
    10,642.63/15,963.95 = 4,395.78/x
  3. Step 3: Cross multiply
    10,642.63x = 15,963.95 × 4,395.78
  4. Step 4: Simplify right side
    10,642.63x = 70,174,008.15
  5. Step 5: Solve for x
    x = 70,174,008.15/10,642.63
  6. Step 6: Final answer
    x = 6,593.67

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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.