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Finding the Fourth Proportional to 20,215.70, 28,360.30 and 20,215.70

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Solution

The fourth proportional to 20,215.70, 28,360.30 and 20,215.70 is: 28,360.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,215.70 : 28,360.30 = 20,215.70 : x
  2. Step 2: Convert to fraction form
    20,215.70/28,360.30 = 20,215.70/x
  3. Step 3: Cross multiply
    20,215.70x = 28,360.30 × 20,215.70
  4. Step 4: Simplify right side
    20,215.70x = 573,323,316.71
  5. Step 5: Solve for x
    x = 573,323,316.71/20,215.70
  6. Step 6: Final answer
    x = 28,360.30

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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.