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Finding the Fourth Proportional to 8,973.30, 12,376.98 and 5,385.81

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Solution

The fourth proportional to 8,973.30, 12,376.98 and 5,385.81 is: 7,428.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    8,973.30 : 12,376.98 = 5,385.81 : x
  2. Step 2: Convert to fraction form
    8,973.30/12,376.98 = 5,385.81/x
  3. Step 3: Cross multiply
    8,973.30x = 12,376.98 × 5,385.81
  4. Step 4: Simplify right side
    8,973.30x = 66,660,062.65
  5. Step 5: Solve for x
    x = 66,660,062.65/8,973.30
  6. Step 6: Final answer
    x = 7,428.71

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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.