Home / 15,445.20-21,315.72-12,922.86

Finding the Fourth Proportional to 15,445.20, 21,315.72 and 12,922.86

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Solution

The fourth proportional to 15,445.20, 21,315.72 and 12,922.86 is: 17,834.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,445.20 : 21,315.72 = 12,922.86 : x
  2. Step 2: Convert to fraction form
    15,445.20/21,315.72 = 12,922.86/x
  3. Step 3: Cross multiply
    15,445.20x = 21,315.72 × 12,922.86
  4. Step 4: Simplify right side
    15,445.20x = 275,460,065.36
  5. Step 5: Solve for x
    x = 275,460,065.36/15,445.20
  6. Step 6: Final answer
    x = 17,834.67

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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.