Home / 26,421.78-39,611.88-13,099.40

Finding the Fourth Proportional to 26,421.78, 39,611.88 and 13,099.40

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Solution

The fourth proportional to 26,421.78, 39,611.88 and 13,099.40 is: 19,638.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    26,421.78 : 39,611.88 = 13,099.40 : x
  2. Step 2: Convert to fraction form
    26,421.78/39,611.88 = 13,099.40/x
  3. Step 3: Cross multiply
    26,421.78x = 39,611.88 × 13,099.40
  4. Step 4: Simplify right side
    26,421.78x = 518,891,860.87
  5. Step 5: Solve for x
    x = 518,891,860.87/26,421.78
  6. Step 6: Final answer
    x = 19,638.79

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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.