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Finding the Fourth Proportional to 10,221.40, 14,329.40 and 10,221.40

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Solution

The fourth proportional to 10,221.40, 14,329.40 and 10,221.40 is: 14,329.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    10,221.40 : 14,329.40 = 10,221.40 : x
  2. Step 2: Convert to fraction form
    10,221.40/14,329.40 = 10,221.40/x
  3. Step 3: Cross multiply
    10,221.40x = 14,329.40 × 10,221.40
  4. Step 4: Simplify right side
    10,221.40x = 146,466,529.16
  5. Step 5: Solve for x
    x = 146,466,529.16/10,221.40
  6. Step 6: Final answer
    x = 14,329.40

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