Home / 12,428.20-18,642.70-4,637.80

Finding the Fourth Proportional to 12,428.20, 18,642.70 and 4,637.80

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Solution

The fourth proportional to 12,428.20, 18,642.70 and 4,637.80 is: 6,956.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,428.20 : 18,642.70 = 4,637.80 : x
  2. Step 2: Convert to fraction form
    12,428.20/18,642.70 = 4,637.80/x
  3. Step 3: Cross multiply
    12,428.20x = 18,642.70 × 4,637.80
  4. Step 4: Simplify right side
    12,428.20x = 86,461,114.06
  5. Step 5: Solve for x
    x = 86,461,114.06/12,428.20
  6. Step 6: Final answer
    x = 6,956.85

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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.