Home / 12,654.40-18,981.92-3,420.32

Finding the Fourth Proportional to 12,654.40, 18,981.92 and 3,420.32

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Solution

The fourth proportional to 12,654.40, 18,981.92 and 3,420.32 is: 5,130.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,654.40 : 18,981.92 = 3,420.32 : x
  2. Step 2: Convert to fraction form
    12,654.40/18,981.92 = 3,420.32/x
  3. Step 3: Cross multiply
    12,654.40x = 18,981.92 × 3,420.32
  4. Step 4: Simplify right side
    12,654.40x = 64,924,240.61
  5. Step 5: Solve for x
    x = 64,924,240.61/12,654.40
  6. Step 6: Final answer
    x = 5,130.57

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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.