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Finding the Fourth Proportional to 3,686.63, 5,070.12 and 2,931.71

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Solution

The fourth proportional to 3,686.63, 5,070.12 and 2,931.71 is: 4,031.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,686.63 : 5,070.12 = 2,931.71 : x
  2. Step 2: Convert to fraction form
    3,686.63/5,070.12 = 2,931.71/x
  3. Step 3: Cross multiply
    3,686.63x = 5,070.12 × 2,931.71
  4. Step 4: Simplify right side
    3,686.63x = 14,864,096.15
  5. Step 5: Solve for x
    x = 14,864,096.15/3,686.63
  6. Step 6: Final answer
    x = 4,031.90

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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.