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Finding the Fourth Proportional to 20,501.70, 28,296.27 and 12,005.70

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Solution

The fourth proportional to 20,501.70, 28,296.27 and 12,005.70 is: 16,570.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,501.70 : 28,296.27 = 12,005.70 : x
  2. Step 2: Convert to fraction form
    20,501.70/28,296.27 = 12,005.70/x
  3. Step 3: Cross multiply
    20,501.70x = 28,296.27 × 12,005.70
  4. Step 4: Simplify right side
    20,501.70x = 339,716,528.74
  5. Step 5: Solve for x
    x = 339,716,528.74/20,501.70
  6. Step 6: Final answer
    x = 16,570.16

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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.