Home / 15,300.63-21,134.12-12,621.56

Finding the Fourth Proportional to 15,300.63, 21,134.12 and 12,621.56

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Solution

The fourth proportional to 15,300.63, 21,134.12 and 12,621.56 is: 17,433.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,300.63 : 21,134.12 = 12,621.56 : x
  2. Step 2: Convert to fraction form
    15,300.63/21,134.12 = 12,621.56/x
  3. Step 3: Cross multiply
    15,300.63x = 21,134.12 × 12,621.56
  4. Step 4: Simplify right side
    15,300.63x = 266,745,394.85
  5. Step 5: Solve for x
    x = 266,745,394.85/15,300.63
  6. Step 6: Final answer
    x = 17,433.62

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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.