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Finding the Fourth Proportional to 7,779.52, 10,736.16 and 4,989.76

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Solution

The fourth proportional to 7,779.52, 10,736.16 and 4,989.76 is: 6,886.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779.52 : 10,736.16 = 4,989.76 : x
  2. Step 2: Convert to fraction form
    7,779.52/10,736.16 = 4,989.76/x
  3. Step 3: Cross multiply
    7,779.52x = 10,736.16 × 4,989.76
  4. Step 4: Simplify right side
    7,779.52x = 53,570,861.72
  5. Step 5: Solve for x
    x = 53,570,861.72/7,779.52
  6. Step 6: Final answer
    x = 6,886.14

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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.