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Finding the Fourth Proportional to 8,645.04, 11,931.12 and 5,109.12

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Solution

The fourth proportional to 8,645.04, 11,931.12 and 5,109.12 is: 7,051.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,645.04 : 11,931.12 = 5,109.12 : x
  2. Step 2: Convert to fraction form
    8,645.04/11,931.12 = 5,109.12/x
  3. Step 3: Cross multiply
    8,645.04x = 11,931.12 × 5,109.12
  4. Step 4: Simplify right side
    8,645.04x = 60,957,523.81
  5. Step 5: Solve for x
    x = 60,957,523.81/8,645.04
  6. Step 6: Final answer
    x = 7,051.16

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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.