Home / 9,787.32-13,507.89-6,439.84

Finding the Fourth Proportional to 9,787.32, 13,507.89 and 6,439.84

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Solution

The fourth proportional to 9,787.32, 13,507.89 and 6,439.84 is: 8,887.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,787.32 : 13,507.89 = 6,439.84 : x
  2. Step 2: Convert to fraction form
    9,787.32/13,507.89 = 6,439.84/x
  3. Step 3: Cross multiply
    9,787.32x = 13,507.89 × 6,439.84
  4. Step 4: Simplify right side
    9,787.32x = 86,988,650.34
  5. Step 5: Solve for x
    x = 86,988,650.34/9,787.32
  6. Step 6: Final answer
    x = 8,887.89

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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.