Home / 21,315.85-29,408.16-12,358.42

Finding the Fourth Proportional to 21,315.85, 29,408.16 and 12,358.42

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Solution

The fourth proportional to 21,315.85, 29,408.16 and 12,358.42 is: 17,050.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,315.85 : 29,408.16 = 12,358.42 : x
  2. Step 2: Convert to fraction form
    21,315.85/29,408.16 = 12,358.42/x
  3. Step 3: Cross multiply
    21,315.85x = 29,408.16 × 12,358.42
  4. Step 4: Simplify right side
    21,315.85x = 363,438,392.71
  5. Step 5: Solve for x
    x = 363,438,392.71/21,315.85
  6. Step 6: Final answer
    x = 17,050.15

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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.