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Finding the Fourth Proportional to 45,407.71, 68,114.13 and 13,818.80

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Solution

The fourth proportional to 45,407.71, 68,114.13 and 13,818.80 is: 20,728.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,407.71 : 68,114.13 = 13,818.80 : x
  2. Step 2: Convert to fraction form
    45,407.71/68,114.13 = 13,818.80/x
  3. Step 3: Cross multiply
    45,407.71x = 68,114.13 × 13,818.80
  4. Step 4: Simplify right side
    45,407.71x = 941,255,530.39
  5. Step 5: Solve for x
    x = 941,255,530.39/45,407.71
  6. Step 6: Final answer
    x = 20,728.98

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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.