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Finding the Fourth Proportional to 7,913.40, 11,870.10 and 6,856.35

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Solution

The fourth proportional to 7,913.40, 11,870.10 and 6,856.35 is: 10,284.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,913.40 : 11,870.10 = 6,856.35 : x
  2. Step 2: Convert to fraction form
    7,913.40/11,870.10 = 6,856.35/x
  3. Step 3: Cross multiply
    7,913.40x = 11,870.10 × 6,856.35
  4. Step 4: Simplify right side
    7,913.40x = 81,385,560.14
  5. Step 5: Solve for x
    x = 81,385,560.14/7,913.40
  6. Step 6: Final answer
    x = 10,284.53

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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.