Home / 11,433.60-15,779.10-6,398.40

Finding the Fourth Proportional to 11,433.60, 15,779.10 and 6,398.40

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Solution

The fourth proportional to 11,433.60, 15,779.10 and 6,398.40 is: 8,830.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,433.60 : 15,779.10 = 6,398.40 : x
  2. Step 2: Convert to fraction form
    11,433.60/15,779.10 = 6,398.40/x
  3. Step 3: Cross multiply
    11,433.60x = 15,779.10 × 6,398.40
  4. Step 4: Simplify right side
    11,433.60x = 100,960,993.44
  5. Step 5: Solve for x
    x = 100,960,993.44/11,433.60
  6. Step 6: Final answer
    x = 8,830.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.