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Finding the Fourth Proportional to 7,187.77, 9,915.07 and 4,315.77

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Solution

The fourth proportional to 7,187.77, 9,915.07 and 4,315.77 is: 5,953.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,187.77 : 9,915.07 = 4,315.77 : x
  2. Step 2: Convert to fraction form
    7,187.77/9,915.07 = 4,315.77/x
  3. Step 3: Cross multiply
    7,187.77x = 9,915.07 × 4,315.77
  4. Step 4: Simplify right side
    7,187.77x = 42,791,161.65
  5. Step 5: Solve for x
    x = 42,791,161.65/7,187.77
  6. Step 6: Final answer
    x = 5,953.33

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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.