Home / 26,279.40-39,419.10-12,455.40

Finding the Fourth Proportional to 26,279.40, 39,419.10 and 12,455.40

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Solution

The fourth proportional to 26,279.40, 39,419.10 and 12,455.40 is: 18,683.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,279.40 : 39,419.10 = 12,455.40 : x
  2. Step 2: Convert to fraction form
    26,279.40/39,419.10 = 12,455.40/x
  3. Step 3: Cross multiply
    26,279.40x = 39,419.10 × 12,455.40
  4. Step 4: Simplify right side
    26,279.40x = 490,980,658.14
  5. Step 5: Solve for x
    x = 490,980,658.14/26,279.40
  6. Step 6: Final answer
    x = 18,683.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.