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Finding the Fourth Proportional to 6,861.76, 10,292.64 and 1,931.40

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Solution

The fourth proportional to 6,861.76, 10,292.64 and 1,931.40 is: 2,897.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,861.76 : 10,292.64 = 1,931.40 : x
  2. Step 2: Convert to fraction form
    6,861.76/10,292.64 = 1,931.40/x
  3. Step 3: Cross multiply
    6,861.76x = 10,292.64 × 1,931.40
  4. Step 4: Simplify right side
    6,861.76x = 19,879,204.90
  5. Step 5: Solve for x
    x = 19,879,204.90/6,861.76
  6. Step 6: Final answer
    x = 2,897.10

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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.