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Finding the Fourth Proportional to 10,007.72, 13,810.74 and 5,531.40

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Solution

The fourth proportional to 10,007.72, 13,810.74 and 5,531.40 is: 7,633.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,007.72 : 13,810.74 = 5,531.40 : x
  2. Step 2: Convert to fraction form
    10,007.72/13,810.74 = 5,531.40/x
  3. Step 3: Cross multiply
    10,007.72x = 13,810.74 × 5,531.40
  4. Step 4: Simplify right side
    10,007.72x = 76,392,727.24
  5. Step 5: Solve for x
    x = 76,392,727.24/10,007.72
  6. Step 6: Final answer
    x = 7,633.38

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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.