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Finding the Fourth Proportional to 7,279.90, 10,903.65 and 6,307.90

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Solution

The fourth proportional to 7,279.90, 10,903.65 and 6,307.90 is: 9,447.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,279.90 : 10,903.65 = 6,307.90 : x
  2. Step 2: Convert to fraction form
    7,279.90/10,903.65 = 6,307.90/x
  3. Step 3: Cross multiply
    7,279.90x = 10,903.65 × 6,307.90
  4. Step 4: Simplify right side
    7,279.90x = 68,779,133.84
  5. Step 5: Solve for x
    x = 68,779,133.84/7,279.90
  6. Step 6: Final answer
    x = 9,447.81

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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.