Home / 20,365.70-28,104.64-12,407.94

Finding the Fourth Proportional to 20,365.70, 28,104.64 and 12,407.94

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Solution

The fourth proportional to 20,365.70, 28,104.64 and 12,407.94 is: 17,122.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,365.70 : 28,104.64 = 12,407.94 : x
  2. Step 2: Convert to fraction form
    20,365.70/28,104.64 = 12,407.94/x
  3. Step 3: Cross multiply
    20,365.70x = 28,104.64 × 12,407.94
  4. Step 4: Simplify right side
    20,365.70x = 348,720,655.82
  5. Step 5: Solve for x
    x = 348,720,655.82/20,365.70
  6. Step 6: Final answer
    x = 17,122.94

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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.