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Finding the Fourth Proportional to 9,358.65, 12,915.36 and 5,381.01

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Solution

The fourth proportional to 9,358.65, 12,915.36 and 5,381.01 is: 7,426.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,358.65 : 12,915.36 = 5,381.01 : x
  2. Step 2: Convert to fraction form
    9,358.65/12,915.36 = 5,381.01/x
  3. Step 3: Cross multiply
    9,358.65x = 12,915.36 × 5,381.01
  4. Step 4: Simplify right side
    9,358.65x = 69,497,681.31
  5. Step 5: Solve for x
    x = 69,497,681.31/9,358.65
  6. Step 6: Final answer
    x = 7,426.04

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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.