Home / 20,358.15-28,090.98-12,402.87

Finding the Fourth Proportional to 20,358.15, 28,090.98 and 12,402.87

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Solution

The fourth proportional to 20,358.15, 28,090.98 and 12,402.87 is: 17,113.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,358.15 : 28,090.98 = 12,402.87 : x
  2. Step 2: Convert to fraction form
    20,358.15/28,090.98 = 12,402.87/x
  3. Step 3: Cross multiply
    20,358.15x = 28,090.98 × 12,402.87
  4. Step 4: Simplify right side
    20,358.15x = 348,408,773.11
  5. Step 5: Solve for x
    x = 348,408,773.11/20,358.15
  6. Step 6: Final answer
    x = 17,113.97

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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.