Home / 15,430.75-21,295.74-8,717.61

Finding the Fourth Proportional to 15,430.75, 21,295.74 and 8,717.61

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Solution

The fourth proportional to 15,430.75, 21,295.74 and 8,717.61 is: 12,031.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,430.75 : 21,295.74 = 8,717.61 : x
  2. Step 2: Convert to fraction form
    15,430.75/21,295.74 = 8,717.61/x
  3. Step 3: Cross multiply
    15,430.75x = 21,295.74 × 8,717.61
  4. Step 4: Simplify right side
    15,430.75x = 185,647,849.50
  5. Step 5: Solve for x
    x = 185,647,849.50/15,430.75
  6. Step 6: Final answer
    x = 12,031.04

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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.