Home / 12,528.20-18,775.90-5,123.99

Finding the Fourth Proportional to 12,528.20, 18,775.90 and 5,123.99

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Solution

The fourth proportional to 12,528.20, 18,775.90 and 5,123.99 is: 7,679.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,528.20 : 18,775.90 = 5,123.99 : x
  2. Step 2: Convert to fraction form
    12,528.20/18,775.90 = 5,123.99/x
  3. Step 3: Cross multiply
    12,528.20x = 18,775.90 × 5,123.99
  4. Step 4: Simplify right side
    12,528.20x = 96,207,577.19
  5. Step 5: Solve for x
    x = 96,207,577.19/12,528.20
  6. Step 6: Final answer
    x = 7,679.28

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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.