Home / 15,535.90-21,440.07-8,821.30

Finding the Fourth Proportional to 15,535.90, 21,440.07 and 8,821.30

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Solution

The fourth proportional to 15,535.90, 21,440.07 and 8,821.30 is: 12,173.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,535.90 : 21,440.07 = 8,821.30 : x
  2. Step 2: Convert to fraction form
    15,535.90/21,440.07 = 8,821.30/x
  3. Step 3: Cross multiply
    15,535.90x = 21,440.07 × 8,821.30
  4. Step 4: Simplify right side
    15,535.90x = 189,129,235.89
  5. Step 5: Solve for x
    x = 189,129,235.89/15,535.90
  6. Step 6: Final answer
    x = 12,173.69

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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.