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Finding the Fourth Proportional to 12,485.80, 18,717.18 and 5,915.08

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Solution

The fourth proportional to 12,485.80, 18,717.18 and 5,915.08 is: 8,867.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,485.80 : 18,717.18 = 5,915.08 : x
  2. Step 2: Convert to fraction form
    12,485.80/18,717.18 = 5,915.08/x
  3. Step 3: Cross multiply
    12,485.80x = 18,717.18 × 5,915.08
  4. Step 4: Simplify right side
    12,485.80x = 110,713,617.07
  5. Step 5: Solve for x
    x = 110,713,617.07/12,485.80
  6. Step 6: Final answer
    x = 8,867.16

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.