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Finding the Fourth Proportional to 9,991.10, 14,979.45 and 6,530.30

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Solution

The fourth proportional to 9,991.10, 14,979.45 and 6,530.30 is: 9,790.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,991.10 : 14,979.45 = 6,530.30 : x
  2. Step 2: Convert to fraction form
    9,991.10/14,979.45 = 6,530.30/x
  3. Step 3: Cross multiply
    9,991.10x = 14,979.45 × 6,530.30
  4. Step 4: Simplify right side
    9,991.10x = 97,820,302.34
  5. Step 5: Solve for x
    x = 97,820,302.34/9,991.10
  6. Step 6: Final answer
    x = 9,790.74

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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.