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Finding the Fourth Proportional to 7,129.76, 10,695.18 and 1,935.50

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Solution

The fourth proportional to 7,129.76, 10,695.18 and 1,935.50 is: 2,903.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,129.76 : 10,695.18 = 1,935.50 : x
  2. Step 2: Convert to fraction form
    7,129.76/10,695.18 = 1,935.50/x
  3. Step 3: Cross multiply
    7,129.76x = 10,695.18 × 1,935.50
  4. Step 4: Simplify right side
    7,129.76x = 20,700,520.89
  5. Step 5: Solve for x
    x = 20,700,520.89/7,129.76
  6. Step 6: Final answer
    x = 2,903.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.