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Finding the Fourth Proportional to 11,376.64, 15,700.08 and 6,661.12

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Solution

The fourth proportional to 11,376.64, 15,700.08 and 6,661.12 is: 9,192.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,376.64 : 15,700.08 = 6,661.12 : x
  2. Step 2: Convert to fraction form
    11,376.64/15,700.08 = 6,661.12/x
  3. Step 3: Cross multiply
    11,376.64x = 15,700.08 × 6,661.12
  4. Step 4: Simplify right side
    11,376.64x = 104,580,116.89
  5. Step 5: Solve for x
    x = 104,580,116.89/11,376.64
  6. Step 6: Final answer
    x = 9,192.53

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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.