Home / 12,433.10-18,618.50-7,432.40

Finding the Fourth Proportional to 12,433.10, 18,618.50 and 7,432.40

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Solution

The fourth proportional to 12,433.10, 18,618.50 and 7,432.40 is: 11,129.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    12,433.10 : 18,618.50 = 7,432.40 : x
  2. Step 2: Convert to fraction form
    12,433.10/18,618.50 = 7,432.40/x
  3. Step 3: Cross multiply
    12,433.10x = 18,618.50 × 7,432.40
  4. Step 4: Simplify right side
    12,433.10x = 138,380,139.40
  5. Step 5: Solve for x
    x = 138,380,139.40/12,433.10
  6. Step 6: Final answer
    x = 11,129.98

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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.