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Finding the Fourth Proportional to 56,940.80, 85,411.20 and 21,881.30

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Solution

The fourth proportional to 56,940.80, 85,411.20 and 21,881.30 is: 32,821.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,940.80 : 85,411.20 = 21,881.30 : x
  2. Step 2: Convert to fraction form
    56,940.80/85,411.20 = 21,881.30/x
  3. Step 3: Cross multiply
    56,940.80x = 85,411.20 × 21,881.30
  4. Step 4: Simplify right side
    56,940.80x = 1,868,908,090.56
  5. Step 5: Solve for x
    x = 1,868,908,090.56/56,940.80
  6. Step 6: Final answer
    x = 32,821.95

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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.