Home / 15,412.56-21,270.78-9,125.88

Finding the Fourth Proportional to 15,412.56, 21,270.78 and 9,125.88

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Solution

The fourth proportional to 15,412.56, 21,270.78 and 9,125.88 is: 12,594.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    15,412.56 : 21,270.78 = 9,125.88 : x
  2. Step 2: Convert to fraction form
    15,412.56/21,270.78 = 9,125.88/x
  3. Step 3: Cross multiply
    15,412.56x = 21,270.78 × 9,125.88
  4. Step 4: Simplify right side
    15,412.56x = 194,114,585.79
  5. Step 5: Solve for x
    x = 194,114,585.79/15,412.56
  6. Step 6: Final answer
    x = 12,594.57

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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.