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Finding the Fourth Proportional to 9,779.80, 14,637.30 and 8,613.40

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Solution

The fourth proportional to 9,779.80, 14,637.30 and 8,613.40 is: 12,891.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,779.80 : 14,637.30 = 8,613.40 : x
  2. Step 2: Convert to fraction form
    9,779.80/14,637.30 = 8,613.40/x
  3. Step 3: Cross multiply
    9,779.80x = 14,637.30 × 8,613.40
  4. Step 4: Simplify right side
    9,779.80x = 126,076,919.82
  5. Step 5: Solve for x
    x = 126,076,919.82/9,779.80
  6. Step 6: Final answer
    x = 12,891.56

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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.