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Finding the Fourth Proportional to 12,157.98, 16,775.64 and 7,438.92

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Solution

The fourth proportional to 12,157.98, 16,775.64 and 7,438.92 is: 10,264.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,157.98 : 16,775.64 = 7,438.92 : x
  2. Step 2: Convert to fraction form
    12,157.98/16,775.64 = 7,438.92/x
  3. Step 3: Cross multiply
    12,157.98x = 16,775.64 × 7,438.92
  4. Step 4: Simplify right side
    12,157.98x = 124,792,643.91
  5. Step 5: Solve for x
    x = 124,792,643.91/12,157.98
  6. Step 6: Final answer
    x = 10,264.26

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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.