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Finding the Fourth Proportional to 7,955.79, 10,981.35 and 4,969.86

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Solution

The fourth proportional to 7,955.79, 10,981.35 and 4,969.86 is: 6,859.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    7,955.79 : 10,981.35 = 4,969.86 : x
  2. Step 2: Convert to fraction form
    7,955.79/10,981.35 = 4,969.86/x
  3. Step 3: Cross multiply
    7,955.79x = 10,981.35 × 4,969.86
  4. Step 4: Simplify right side
    7,955.79x = 54,575,772.11
  5. Step 5: Solve for x
    x = 54,575,772.11/7,955.79
  6. Step 6: Final answer
    x = 6,859.88

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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.