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Finding the Fourth Proportional to 15,107.55, 20,865.87 and 10,063.47

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Solution

The fourth proportional to 15,107.55, 20,865.87 and 10,063.47 is: 13,899.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,107.55 : 20,865.87 = 10,063.47 : x
  2. Step 2: Convert to fraction form
    15,107.55/20,865.87 = 10,063.47/x
  3. Step 3: Cross multiply
    15,107.55x = 20,865.87 × 10,063.47
  4. Step 4: Simplify right side
    15,107.55x = 209,983,056.77
  5. Step 5: Solve for x
    x = 209,983,056.77/15,107.55
  6. Step 6: Final answer
    x = 13,899.21

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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.