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Finding the Fourth Proportional to 7,209.91, 9,948.90 and 4,225.15

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Solution

The fourth proportional to 7,209.91, 9,948.90 and 4,225.15 is: 5,830.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,209.91 : 9,948.90 = 4,225.15 : x
  2. Step 2: Convert to fraction form
    7,209.91/9,948.90 = 4,225.15/x
  3. Step 3: Cross multiply
    7,209.91x = 9,948.90 × 4,225.15
  4. Step 4: Simplify right side
    7,209.91x = 42,035,594.84
  5. Step 5: Solve for x
    x = 42,035,594.84/7,209.91
  6. Step 6: Final answer
    x = 5,830.25

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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.