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Finding the Fourth Proportional to 7,955.80, 10,978.95 and 4,419.07

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Solution

The fourth proportional to 7,955.80, 10,978.95 and 4,419.07 is: 6,098.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,955.80 : 10,978.95 = 4,419.07 : x
  2. Step 2: Convert to fraction form
    7,955.80/10,978.95 = 4,419.07/x
  3. Step 3: Cross multiply
    7,955.80x = 10,978.95 × 4,419.07
  4. Step 4: Simplify right side
    7,955.80x = 48,516,748.58
  5. Step 5: Solve for x
    x = 48,516,748.58/7,955.80
  6. Step 6: Final answer
    x = 6,098.29

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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.