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Finding the Fourth Proportional to 8,969.92, 13,460.28 and 3,130.63

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Solution

The fourth proportional to 8,969.92, 13,460.28 and 3,130.63 is: 4,697.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,969.92 : 13,460.28 = 3,130.63 : x
  2. Step 2: Convert to fraction form
    8,969.92/13,460.28 = 3,130.63/x
  3. Step 3: Cross multiply
    8,969.92x = 13,460.28 × 3,130.63
  4. Step 4: Simplify right side
    8,969.92x = 42,139,156.38
  5. Step 5: Solve for x
    x = 42,139,156.38/8,969.92
  6. Step 6: Final answer
    x = 4,697.83

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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.