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Finding the Fourth Proportional to 9,925.16, 13,693.90 and 6,390.42

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Solution

The fourth proportional to 9,925.16, 13,693.90 and 6,390.42 is: 8,816.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,925.16 : 13,693.90 = 6,390.42 : x
  2. Step 2: Convert to fraction form
    9,925.16/13,693.90 = 6,390.42/x
  3. Step 3: Cross multiply
    9,925.16x = 13,693.90 × 6,390.42
  4. Step 4: Simplify right side
    9,925.16x = 87,509,772.44
  5. Step 5: Solve for x
    x = 87,509,772.44/9,925.16
  6. Step 6: Final answer
    x = 8,816.96

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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.