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Finding the Fourth Proportional to 4,973.79, 6,866.20 and 3,157.74

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Solution

The fourth proportional to 4,973.79, 6,866.20 and 3,157.74 is: 4,359.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    4,973.79 : 6,866.20 = 3,157.74 : x
  2. Step 2: Convert to fraction form
    4,973.79/6,866.20 = 3,157.74/x
  3. Step 3: Cross multiply
    4,973.79x = 6,866.20 × 3,157.74
  4. Step 4: Simplify right side
    4,973.79x = 21,681,674.39
  5. Step 5: Solve for x
    x = 21,681,674.39/4,973.79
  6. Step 6: Final answer
    x = 4,359.19

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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.