Home / 12,438.90-18,663.21-4,648.32

Finding the Fourth Proportional to 12,438.90, 18,663.21 and 4,648.32

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Solution

The fourth proportional to 12,438.90, 18,663.21 and 4,648.32 is: 6,974.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,438.90 : 18,663.21 = 4,648.32 : x
  2. Step 2: Convert to fraction form
    12,438.90/18,663.21 = 4,648.32/x
  3. Step 3: Cross multiply
    12,438.90x = 18,663.21 × 4,648.32
  4. Step 4: Simplify right side
    12,438.90x = 86,752,572.31
  5. Step 5: Solve for x
    x = 86,752,572.31/12,438.90
  6. Step 6: Final answer
    x = 6,974.30

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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.