Home / 12,138.48-18,209.64-4,347.12

Finding the Fourth Proportional to 12,138.48, 18,209.64 and 4,347.12

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Solution

The fourth proportional to 12,138.48, 18,209.64 and 4,347.12 is: 6,521.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,138.48 : 18,209.64 = 4,347.12 : x
  2. Step 2: Convert to fraction form
    12,138.48/18,209.64 = 4,347.12/x
  3. Step 3: Cross multiply
    12,138.48x = 18,209.64 × 4,347.12
  4. Step 4: Simplify right side
    12,138.48x = 79,159,490.24
  5. Step 5: Solve for x
    x = 79,159,490.24/12,138.48
  6. Step 6: Final answer
    x = 6,521.37

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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.