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Finding the Fourth Proportional to 7,858.64, 11,788.32 and 5,560.40

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Solution

The fourth proportional to 7,858.64, 11,788.32 and 5,560.40 is: 8,340.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,858.64 : 11,788.32 = 5,560.40 : x
  2. Step 2: Convert to fraction form
    7,858.64/11,788.32 = 5,560.40/x
  3. Step 3: Cross multiply
    7,858.64x = 11,788.32 × 5,560.40
  4. Step 4: Simplify right side
    7,858.64x = 65,547,774.53
  5. Step 5: Solve for x
    x = 65,547,774.53/7,858.64
  6. Step 6: Final answer
    x = 8,340.85

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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.