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Finding the Fourth Proportional to 11,355.06, 15,670.05 and 6,387.06

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Solution

The fourth proportional to 11,355.06, 15,670.05 and 6,387.06 is: 8,814.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,355.06 : 15,670.05 = 6,387.06 : x
  2. Step 2: Convert to fraction form
    11,355.06/15,670.05 = 6,387.06/x
  3. Step 3: Cross multiply
    11,355.06x = 15,670.05 × 6,387.06
  4. Step 4: Simplify right side
    11,355.06x = 100,085,549.55
  5. Step 5: Solve for x
    x = 100,085,549.55/11,355.06
  6. Step 6: Final answer
    x = 8,814.18

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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.