Home / 9,191.10-12,681.68-5,211.30

Finding the Fourth Proportional to 9,191.10, 12,681.68 and 5,211.30

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Solution

The fourth proportional to 9,191.10, 12,681.68 and 5,211.30 is: 7,190.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    9,191.10 : 12,681.68 = 5,211.30 : x
  2. Step 2: Convert to fraction form
    9,191.10/12,681.68 = 5,211.30/x
  3. Step 3: Cross multiply
    9,191.10x = 12,681.68 × 5,211.30
  4. Step 4: Simplify right side
    9,191.10x = 66,088,038.98
  5. Step 5: Solve for x
    x = 66,088,038.98/9,191.10
  6. Step 6: Final answer
    x = 7,190.44

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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.