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Finding the Fourth Proportional to 7,779.52, 10,741.62 and 5,130.64

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Solution

The fourth proportional to 7,779.52, 10,741.62 and 5,130.64 is: 7,084.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,779.52 : 10,741.62 = 5,130.64 : x
  2. Step 2: Convert to fraction form
    7,779.52/10,741.62 = 5,130.64/x
  3. Step 3: Cross multiply
    7,779.52x = 10,741.62 × 5,130.64
  4. Step 4: Simplify right side
    7,779.52x = 55,111,385.24
  5. Step 5: Solve for x
    x = 55,111,385.24/7,779.52
  6. Step 6: Final answer
    x = 7,084.16

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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.