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Finding the Fourth Proportional to 8,643.20, 11,927.64 and 4,866.16

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Solution

The fourth proportional to 8,643.20, 11,927.64 and 4,866.16 is: 6,715.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,643.20 : 11,927.64 = 4,866.16 : x
  2. Step 2: Convert to fraction form
    8,643.20/11,927.64 = 4,866.16/x
  3. Step 3: Cross multiply
    8,643.20x = 11,927.64 × 4,866.16
  4. Step 4: Simplify right side
    8,643.20x = 58,041,804.66
  5. Step 5: Solve for x
    x = 58,041,804.66/8,643.20
  6. Step 6: Final answer
    x = 6,715.31

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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.