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Finding the Fourth Proportional to 40,615.70, 60,921.95 and 12,912.66

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Solution

The fourth proportional to 40,615.70, 60,921.95 and 12,912.66 is: 19,368.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    40,615.70 : 60,921.95 = 12,912.66 : x
  2. Step 2: Convert to fraction form
    40,615.70/60,921.95 = 12,912.66/x
  3. Step 3: Cross multiply
    40,615.70x = 60,921.95 × 12,912.66
  4. Step 4: Simplify right side
    40,615.70x = 786,664,426.89
  5. Step 5: Solve for x
    x = 786,664,426.89/40,615.70
  6. Step 6: Final answer
    x = 19,368.48

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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.