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Finding the Fourth Proportional to 7,989.32, 11,913.58 and 7,435.28

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Solution

The fourth proportional to 7,989.32, 11,913.58 and 7,435.28 is: 11,087.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,989.32 : 11,913.58 = 7,435.28 : x
  2. Step 2: Convert to fraction form
    7,989.32/11,913.58 = 7,435.28/x
  3. Step 3: Cross multiply
    7,989.32x = 11,913.58 × 7,435.28
  4. Step 4: Simplify right side
    7,989.32x = 88,580,803.10
  5. Step 5: Solve for x
    x = 88,580,803.10/7,989.32
  6. Step 6: Final answer
    x = 11,087.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.