Home / 15,215.85-21,024.44-12,558.65

Finding the Fourth Proportional to 15,215.85, 21,024.44 and 12,558.65

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Solution

The fourth proportional to 15,215.85, 21,024.44 and 12,558.65 is: 17,352.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,215.85 : 21,024.44 = 12,558.65 : x
  2. Step 2: Convert to fraction form
    15,215.85/21,024.44 = 12,558.65/x
  3. Step 3: Cross multiply
    15,215.85x = 21,024.44 × 12,558.65
  4. Step 4: Simplify right side
    15,215.85x = 264,038,415.49
  5. Step 5: Solve for x
    x = 264,038,415.49/15,215.85
  6. Step 6: Final answer
    x = 17,352.85

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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.