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Finding the Fourth Proportional to 8,963.94, 12,368.20 and 5,187.01

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Solution

The fourth proportional to 8,963.94, 12,368.20 and 5,187.01 is: 7,156.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,963.94 : 12,368.20 = 5,187.01 : x
  2. Step 2: Convert to fraction form
    8,963.94/12,368.20 = 5,187.01/x
  3. Step 3: Cross multiply
    8,963.94x = 12,368.20 × 5,187.01
  4. Step 4: Simplify right side
    8,963.94x = 64,153,977.08
  5. Step 5: Solve for x
    x = 64,153,977.08/8,963.94
  6. Step 6: Final answer
    x = 7,156.89

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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.