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Finding the Fourth Proportional to 14,136.70, 21,205.05 and 7,210.30

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Solution

The fourth proportional to 14,136.70, 21,205.05 and 7,210.30 is: 10,815.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,136.70 : 21,205.05 = 7,210.30 : x
  2. Step 2: Convert to fraction form
    14,136.70/21,205.05 = 7,210.30/x
  3. Step 3: Cross multiply
    14,136.70x = 21,205.05 × 7,210.30
  4. Step 4: Simplify right side
    14,136.70x = 152,894,772.02
  5. Step 5: Solve for x
    x = 152,894,772.02/14,136.70
  6. Step 6: Final answer
    x = 10,815.45

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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.