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Finding the Fourth Proportional to 7,145.04, 9,859.27 and 3,957.90

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Solution

The fourth proportional to 7,145.04, 9,859.27 and 3,957.90 is: 5,461.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,145.04 : 9,859.27 = 3,957.90 : x
  2. Step 2: Convert to fraction form
    7,145.04/9,859.27 = 3,957.90/x
  3. Step 3: Cross multiply
    7,145.04x = 9,859.27 × 3,957.90
  4. Step 4: Simplify right side
    7,145.04x = 39,021,965.29
  5. Step 5: Solve for x
    x = 39,021,965.29/7,145.04
  6. Step 6: Final answer
    x = 5,461.40

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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.