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Finding the Fourth Proportional to 5,915.70, 8,830.25 and 5,215.11

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Solution

The fourth proportional to 5,915.70, 8,830.25 and 5,215.11 is: 7,784.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    5,915.70 : 8,830.25 = 5,215.11 : x
  2. Step 2: Convert to fraction form
    5,915.70/8,830.25 = 5,215.11/x
  3. Step 3: Cross multiply
    5,915.70x = 8,830.25 × 5,215.11
  4. Step 4: Simplify right side
    5,915.70x = 46,050,699.00
  5. Step 5: Solve for x
    x = 46,050,699.00/5,915.70
  6. Step 6: Final answer
    x = 7,784.49

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.