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Finding the Fourth Proportional to 7,487, 10,331.86 and 4,129.64

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Solution

The fourth proportional to 7,487, 10,331.86 and 4,129.64 is: 5,698.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,487 : 10,331.86 = 4,129.64 : x
  2. Step 2: Convert to fraction form
    7,487/10,331.86 = 4,129.64/x
  3. Step 3: Cross multiply
    7,487x = 10,331.86 × 4,129.64
  4. Step 4: Simplify right side
    7,487x = 42,666,862.33
  5. Step 5: Solve for x
    x = 42,666,862.33/7,487
  6. Step 6: Final answer
    x = 5,698.79

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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.