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Finding the Fourth Proportional to 10,957.68, 15,118.92 and 7,419.60

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Solution

The fourth proportional to 10,957.68, 15,118.92 and 7,419.60 is: 10,237.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,957.68 : 15,118.92 = 7,419.60 : x
  2. Step 2: Convert to fraction form
    10,957.68/15,118.92 = 7,419.60/x
  3. Step 3: Cross multiply
    10,957.68x = 15,118.92 × 7,419.60
  4. Step 4: Simplify right side
    10,957.68x = 112,176,338.83
  5. Step 5: Solve for x
    x = 112,176,338.83/10,957.68
  6. Step 6: Final answer
    x = 10,237.23

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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.