Home / 11,915.38-16,439.88-9,389.65

Finding the Fourth Proportional to 11,915.38, 16,439.88 and 9,389.65

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Solution

The fourth proportional to 11,915.38, 16,439.88 and 9,389.65 is: 12,955.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,915.38 : 16,439.88 = 9,389.65 : x
  2. Step 2: Convert to fraction form
    11,915.38/16,439.88 = 9,389.65/x
  3. Step 3: Cross multiply
    11,915.38x = 16,439.88 × 9,389.65
  4. Step 4: Simplify right side
    11,915.38x = 154,364,678.14
  5. Step 5: Solve for x
    x = 154,364,678.14/11,915.38
  6. Step 6: Final answer
    x = 12,955.08

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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.