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Finding the Fourth Proportional to 9,779.40, 14,652.90 and 8,321.40

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Solution

The fourth proportional to 9,779.40, 14,652.90 and 8,321.40 is: 12,468.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,779.40 : 14,652.90 = 8,321.40 : x
  2. Step 2: Convert to fraction form
    9,779.40/14,652.90 = 8,321.40/x
  3. Step 3: Cross multiply
    9,779.40x = 14,652.90 × 8,321.40
  4. Step 4: Simplify right side
    9,779.40x = 121,932,642.06
  5. Step 5: Solve for x
    x = 121,932,642.06/9,779.40
  6. Step 6: Final answer
    x = 12,468.32

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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.