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Finding the Fourth Proportional to 7,959.08, 10,978.44 and 5,130.08

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Solution

The fourth proportional to 7,959.08, 10,978.44 and 5,130.08 is: 7,076.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,959.08 : 10,978.44 = 5,130.08 : x
  2. Step 2: Convert to fraction form
    7,959.08/10,978.44 = 5,130.08/x
  3. Step 3: Cross multiply
    7,959.08x = 10,978.44 × 5,130.08
  4. Step 4: Simplify right side
    7,959.08x = 56,320,275.48
  5. Step 5: Solve for x
    x = 56,320,275.48/7,959.08
  6. Step 6: Final answer
    x = 7,076.23

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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.