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Finding the Fourth Proportional to 14,153.40, 21,119.40 and 14,056.20

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Solution

The fourth proportional to 14,153.40, 21,119.40 and 14,056.20 is: 20,974.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,153.40 : 21,119.40 = 14,056.20 : x
  2. Step 2: Convert to fraction form
    14,153.40/21,119.40 = 14,056.20/x
  3. Step 3: Cross multiply
    14,153.40x = 21,119.40 × 14,056.20
  4. Step 4: Simplify right side
    14,153.40x = 296,858,510.28
  5. Step 5: Solve for x
    x = 296,858,510.28/14,153.40
  6. Step 6: Final answer
    x = 20,974.36

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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 (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.