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Finding the Fourth Proportional to 7,187.88, 9,915.23 and 4,315.88

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Solution

The fourth proportional to 7,187.88, 9,915.23 and 4,315.88 is: 5,953.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.88 : 9,915.23 = 4,315.88 : x
  2. Step 2: Convert to fraction form
    7,187.88/9,915.23 = 4,315.88/x
  3. Step 3: Cross multiply
    7,187.88x = 9,915.23 × 4,315.88
  4. Step 4: Simplify right side
    7,187.88x = 42,792,871.70
  5. Step 5: Solve for x
    x = 42,792,871.70/7,187.88
  6. Step 6: Final answer
    x = 5,953.48

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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.