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Finding the Fourth Proportional to 8,964.45, 12,368.90 and 5,187.51

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Solution

The fourth proportional to 8,964.45, 12,368.90 and 5,187.51 is: 7,157.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,964.45 : 12,368.90 = 5,187.51 : x
  2. Step 2: Convert to fraction form
    8,964.45/12,368.90 = 5,187.51/x
  3. Step 3: Cross multiply
    8,964.45x = 12,368.90 × 5,187.51
  4. Step 4: Simplify right side
    8,964.45x = 64,163,766.50
  5. Step 5: Solve for x
    x = 64,163,766.50/8,964.45
  6. Step 6: Final answer
    x = 7,157.58

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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.