Home / 12,657.20-18,985.80-3,892.10

Finding the Fourth Proportional to 12,657.20, 18,985.80 and 3,892.10

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Solution

The fourth proportional to 12,657.20, 18,985.80 and 3,892.10 is: 5,838.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,657.20 : 18,985.80 = 3,892.10 : x
  2. Step 2: Convert to fraction form
    12,657.20/18,985.80 = 3,892.10/x
  3. Step 3: Cross multiply
    12,657.20x = 18,985.80 × 3,892.10
  4. Step 4: Simplify right side
    12,657.20x = 73,894,632.18
  5. Step 5: Solve for x
    x = 73,894,632.18/12,657.20
  6. Step 6: Final answer
    x = 5,838.15

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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.