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Finding the Fourth Proportional to 10,602.20, 15,903.30 and 8,633.90

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Solution

The fourth proportional to 10,602.20, 15,903.30 and 8,633.90 is: 12,950.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,602.20 : 15,903.30 = 8,633.90 : x
  2. Step 2: Convert to fraction form
    10,602.20/15,903.30 = 8,633.90/x
  3. Step 3: Cross multiply
    10,602.20x = 15,903.30 × 8,633.90
  4. Step 4: Simplify right side
    10,602.20x = 137,307,501.87
  5. Step 5: Solve for x
    x = 137,307,501.87/10,602.20
  6. Step 6: Final answer
    x = 12,950.85

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Half scale
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Double scale
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Similar ratio
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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.