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Finding the Fourth Proportional to 11,354.95, 15,660.93 and 7,772.05

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Solution

The fourth proportional to 11,354.95, 15,660.93 and 7,772.05 is: 10,719.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    11,354.95 : 15,660.93 = 7,772.05 : x
  2. Step 2: Convert to fraction form
    11,354.95/15,660.93 = 7,772.05/x
  3. Step 3: Cross multiply
    11,354.95x = 15,660.93 × 7,772.05
  4. Step 4: Simplify right side
    11,354.95x = 121,717,531.01
  5. Step 5: Solve for x
    x = 121,717,531.01/11,354.95
  6. Step 6: Final answer
    x = 10,719.34

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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.