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Finding the Fourth Proportional to 14,230.76, 19,638.40 and 7,943.08

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Solution

The fourth proportional to 14,230.76, 19,638.40 and 7,943.08 is: 10,961.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,230.76 : 19,638.40 = 7,943.08 : x
  2. Step 2: Convert to fraction form
    14,230.76/19,638.40 = 7,943.08/x
  3. Step 3: Cross multiply
    14,230.76x = 19,638.40 × 7,943.08
  4. Step 4: Simplify right side
    14,230.76x = 155,989,382.27
  5. Step 5: Solve for x
    x = 155,989,382.27/14,230.76
  6. Step 6: Final answer
    x = 10,961.42

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Half scale
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Double scale
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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.