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Finding the Fourth Proportional to 45,392.70, 68,088.90 and 13,802.55

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Solution

The fourth proportional to 45,392.70, 68,088.90 and 13,802.55 is: 20,703.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    45,392.70 : 68,088.90 = 13,802.55 : x
  2. Step 2: Convert to fraction form
    45,392.70/68,088.90 = 13,802.55/x
  3. Step 3: Cross multiply
    45,392.70x = 68,088.90 × 13,802.55
  4. Step 4: Simplify right side
    45,392.70x = 939,800,626.12
  5. Step 5: Solve for x
    x = 939,800,626.12/45,392.70
  6. Step 6: Final answer
    x = 20,703.78

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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.