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Finding the Fourth Proportional to 25,890.60, 38,807.10 and 14,212.20

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Solution

The fourth proportional to 25,890.60, 38,807.10 and 14,212.20 is: 21,302.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    25,890.60 : 38,807.10 = 14,212.20 : x
  2. Step 2: Convert to fraction form
    25,890.60/38,807.10 = 14,212.20/x
  3. Step 3: Cross multiply
    25,890.60x = 38,807.10 × 14,212.20
  4. Step 4: Simplify right side
    25,890.60x = 551,534,266.62
  5. Step 5: Solve for x
    x = 551,534,266.62/25,890.60
  6. Step 6: Final answer
    x = 21,302.49

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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.